SKU: 48085068749

Shapton Glass Stone HR 4.90 Micron #3000 Grit

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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18

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Description

Shapton Glass Stone HR 4.90 Micron #3000 GritHighlights Medium grit stone with 3000 grit for edge maintenance and general purpose cutting Thin, light, and strong construction Resistant to cracking and breakage Description The Shapton Glass Stone HR 4. 90 Micron #3000 Grit belongs to the Glass Stone series, known for its revolutionary design combining layers of tempered glass to provide excellent usability in a thin package. This series offers a wide selection of stones, allowing users to achieve

Highlights
  • Medium grit stone with 3000 grit for edge maintenance and general purpose cutting
  • Thin, light, and strong construction
  • Resistant to cracking and breakage
Description

The Shapton Glass Stone HR 4.90 Micron #3000 Grit belongs to the Glass Stone series, known for its revolutionary design combining layers of tempered glass to provide excellent usability in a thin package.

This series offers a wide selection of stones, allowing users to achieve their desired blade finish effectively. The 3000 grit Glass Stone is classified as a medium grit stone, suitable for edge maintenance for knives that are used more frequently. It leaves a great working edge for general-purpose cutting and provides a minor level of polish.

Contrary to the conventional belief that sharpening stones are large and heavy, Glass Stones are thin, light, and strong due to the layers of tempered glass bonded together. This construction provides excellent resistance to cracking or sudden breakage caused by external shocks, ensuring long-lasting performance.

The abrasives in these glass stones are extremely uniform, ensuring consistent performance from the first pass to the end of the stone's lifespan.

The Glass Stone series includes two types each of the 4000, 6000, and 8000 sharpening stones. The main difference between them lies in the abrasive agents used. Specifically, the Glass Stone series 50603, 50703, and 50803 are recommended for sharpening composite steel blades where steel has been forge-welded with another metal.

Each Glass Stone in the series is composed of a 5mm tempered glass backing plate bonded to a 5mm thick stone. Shapton sharpening Glass Stones are made with finely graded ceramic cutting media that requires less flattening and has a longer lifespan compared to most whetstones.

For premium stability and professional results, consider adding a Shapton Stone holder to your sharpening setup.

Specifications
  • Micron: 4.90
  • Mesh: 3000
  • Dimensions: 210 x 70 x 10mm (Abrasive Layer 5mm)
  • Weight: approx. 360g
  • SKU: 50402
  • Type: Medium
  • Made in Japan
Product Inclusions
  • 1 x 4.90 Micron #3000 grit sharpening stone
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 48085068749

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4.1 ★★★★★
Based on 14 reviews
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Product Reviews
J
Verified Purchase
John Quargnenti
Lexington, US
★★★★★ 3
They need to find a better way to ship it
Style: 1 gal
What was left in the bottle worked great. However, the cap was off of the jug when I opened the package. Ididn't have enough for the other tires.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2026
E
Verified Purchase
Ernie Duchek
New York, US
★★★★★ 5
Top notch tire sealant!
Size: 20oz
Really good sealant that lives up to it's description. Very easy to use and definitely delivers. Have used it on several Lazer Z mowers and works as advertised! Definitely would recommend this one!
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Reviewed in the United States on April 26, 2026
T
Verified Purchase
Thorin C. Guidry
New York, US
★★★★★ 5
This stuff just works! Very impressed. If you have a slow leak, get this!
Size: 20oz
This is the second time I've bought this product. I bought one initially to test it out and I was very impressed! I had put some used tires on some used rims for my side by side and I had a couple of them leaking slowly from the side of the rim. I put this stuff in, following the directions and have no more leaks! It's been about a week with the first one, and zero loss in air pressure. I took my side by side out on the trails and thrashed around a bit, still no leaks! This stuff is legit! It comes with a valve removal tool and red valve stem covers to show you which tires you've added this too. Very easy to use, no issues whatsoever. Saves you money having to take your tires somewhere to have them look at them.
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Reviewed in the United States on September 15, 2025
R
Verified Purchase
Robert
Draper, US
★★★★★ 5
This stuff worked better than I thought it would
Size: 40oz
As my title says, this stuff worked better than I thought it would. In fact it worked so well today I will be ordering more. I say today because how can you tell if something like this is actually working... never getting a flat for years? In other words, if it fixes a flat before your eyes it works, otherwise you really don't know. See I had a lawn mower tractor that developed a real bad tire leak a couple of days ago. The way it happened was I cut a Russian Olive tree down, if you know what one of these trees are like, you already know why I got such a bad leak. These darn things have thorns that can get to be almost as big around as a pencil, and are just as sharp as a needle. Moreover, these spikes as I call them, can get to be 3" to 4" long. In short, if you run over one you will have a flat tire, period. That is unless you have this stuff inside the tire already. To make matters worse, if you run over a branch from this tree, you won't only get one or two thorns/spikes stuck in your tire, because as you drive the branch bends easily (only the spike are ridged), so before you know it you will end up with a half dozen of these spikes all the way around your tire, as if the whole tire has a new tread made up of a Russian Olive tree branch. Trust me on this, it will happen just like this. After pulling a half dozen 2" to 4" inch spikes out of the tire, I knew if I took it to a shop they would require me to put a tube in. With this inflation that isn't supposed to be an inflation going on, I'm sure it has made tire tubes today cost almost as much as the whole tire cost me just a couple of years ago. So I thought I'd put this product to a real test... I already have some in my John Deere 2305 tractor. Honestly, it shocked me how quick it worked. It worked so fast I didn't even need to add anymore air to the tire, because all the holes were shut. Pretty amazing stuff if you ask me! I followed the directions, they were easy to follow and the process was easy too. I removed the valve stem, put in 5 ounces of the solution, then put the valve stem back in, aired up the tire and it was instantly fixed... amazing, especially considering why the tire was flat... I should have taken a pic of the spikes. I did roll the tire around a bit, then mounted the tire back on the tractor and went right over and mowed my elderly neighbors lawn, so it got plenty of rotation time. That was about 4 hours ago and the tire is still rock hard. Like I said, I'm ordering more because after seeing this everything we have that runs slow will have this stuff in the tires! Oh, one other thing. The fix-it flat stuff in a spray can, DO NOT USE IT for applications like this! Because that stuff if left inside will actually glue your tire to the rim. Tires have been ruined trying to pry them away from the rim after putting in fix-a-flat, or whatever that crap is called. Sadly this "TireJect" is not recommended for high speed travel, it will through your tire out of balance. So use the fix-flat stuff in an emergency, carry one in your car just in case. Just make sure once you get the tire fixed wash the tire out real good before remounting it. I have never written such a long review in my life, but if you got through it I hope it helped. It's not often a product lives up to it's claims today, but this one in my opinion surpasses it, so I felt the need to say something. Besides, the warning about the Russian Olive tree just may save someone a lot of frustrations.
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Reviewed in the United States on May 24, 2023
J
Verified Purchase
Juno
Boise, US
★★★★★ 5
It Really Works!
Size: 40oz
Excellent product-stops leaks!!
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Reviewed in the United States on April 25, 2026

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