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Description
PSS Shaft Seal 1-⅜" Shaft 2-½" TubePSS Shaft Seal 1 3 8" Shaft 2 1 2" Tube Shaft Diameter: 1 3 8" Stern Tube Diameter (D): 2 1 2" to 2 5 8" Total Length (A): 7. 38" Total Length (compressed) (Compressed A): 6. 38" Rotor Diameter (B): 2. 875" Carbon Cuff Diameter (C): 2. 5" Stern Cuff Length (E): 1. 5" The PSS Shaft Seal is the number one selling marine mechanical seal worldwide and is installed as standard equipment by many of the worlds most reputable boat builders yards. The PSS
PSS Shaft Seal 1-3/8" Shaft 2-1/2" TubeShaft Diameter: 1-3/8"
Stern Tube Diameter (D): 2-1/2" to 2-5/8"
Total Length (A): 7.38"
Total Length (compressed) (Compressed A): 6.38"
Rotor Diameter (B): 2.875"
Carbon Cuff Diameter (C): 2.5"
Stern Cuff Length (E): 1.5"
The PSS Shaft Seal is the number one selling marine mechanical seal worldwide and is installed as standard equipment by many of the worlds most reputable boat builders / yards. The PSS Shaft Seal is also recognized as the premiere retrofit (aftermarket) seal on the world market. Certified by Bureau Veritas, ABS & Rina: Boat builders / yards recognize the advantages and value of installing the PSS as it eliminates the maintenance, constant adjustment & cost associated with traditional packing type glands. Aside from these benefits, the PSS Shaft Seal helps to eliminate water in the bilge (100% water tight) & wear to the propeller shaft. The PSS Shaft Seal can be easily retrofitted and is available for shafts ranging from 3/4" (20mm) to 6" (150mm).
The PSS Shaft Seal is a mechanical face seal that is created between the flat surfaces of the rotating stainless steel rotor and the stationary carbon flange. The stationary carbon flange is attached to the vessels stern tube with hose clamps and the carbon flange is attached to the front side of the bellows with hose clamps. The stainless steel rotor is fit on the shaft in front of the carbon flange. The stainless steel rotor is used to compress the bellows before the collar is secured to the shaft with set-screws. This compression (pre-load) maintains contact between the faces and allows the PSS to compensate for the thrust from the propeller. The carbon flange is bored larger than the shaft diameter allowing it to "float" around the shaft and thus compensate for most misalignment and vibration problems. The stainless steel collar is sealed to the shaft by two o-rings that are recessed into the bore of the collar. These o-rings rotate with the shaft and stainless steel rotor and do not experience wear during operation.
**As with any rubber hose below waterline, the PSS bellows must be inspected on a regular basis for any sign of wear, aging or chemical deterioration. PYI suggests as preventative maintenance that the PSS bellow be replaced in six year intervals. During bellows replacement it is recommended the o-rings & set screws in the stainless steel rotor also be replaced."
Bellows may need to be more frequently inspected in an environment where non-sealed batteries emit sulfuric acid. Sulfuric acid vapor will accelerate rubber deterioration, as will an ozonater.
The Maintenance Kit includes the items you need to properly maintain your PSS Shaft Seal. Included in the kit is one (1) PSS bellow, two (2) O-rings, five (5) set screws, four (4) new hose clamps and an allen key.
Manufacturer Part Numbers: 02-138-212
Brochure Literature (PDF)
Installation Guide (PDF)
GRP:WRO
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.7 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
Great for iPad kids👍
Color: Sky Blue
I bought this in 2023/2024 and it's still intact and usable after hundreds of food stains and me accidentally dropping it. Thank you for protecting my iPad, very great product. Otherwise, my mom would've beat my ass for breaking the iPad. PSA, the case looks the same as the picture😛
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Great case for the price! Love the color!
Color: Sky Blue, Color: Sky Blue
I’ve had this case on my iPad (A16 11th gen) for a few months now and it’s held up really well. It still looks good with only a few minor scuff marks, which is expected with regular use.
The front cover has a slight magnetic feel, so it stays closed nicely, and I like that it folds back to prop the iPad up for watching or typing. It’s not super bulky but still gives good protection. Also has a pen holder spot on the side!
Overall, it’s a great affordable option if you want something simple, functional, and durable without spending a lot!
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Reviewed in the United States on April 13, 2026
★★★★★ 5
Cute
Color: Purple
Fits like a glove
Lightweight and well made easy to hold not slippery. Looks very clean and seemless.
Worth every cent
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Quality case
Color: Black
Great protective cover for the price
Fits perfectly with no slipping
Has a bit of weight to it but not an issue
I bought the black cover and so far holds up well against fingerprints and smudges.
Shipping was prompt
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Functional, Sleek, & Surprising!
Color: Black
If you want a slim, durable, no-nonsense protective cover for your iPad Pro that doesn’t bulk up your setup, this ProCase protective cover hits the sweet spot. I’ve been using it daily for over 3 weeks, and here’s my honest take after testing in real life:
What I Loved…
- Lightweight, streamlined protection
From day one, this case stayed true to its promise. It doesn’t add unnecessary bulk. It feels solid in the hand but never feels heavy or clunky when carrying the iPad around. That balance is rare at this price point.
- Clean, professional aesthetic
The matte black finish looks great whether I’m in a meeting, on Zoom calls, or using the iPad casually. It doesn’t scream budget case, instead it gives a minimalist vibe.
- Strong everyday defense
The hard back and snug fit protected my iPad from the few accidental knocks and desk slides I put it through. No scratches or dents so far. It’s perfect for daily living and work use.
- Magnetized sleep/wake & easy handling
Opening the cover reliably wakes the iPad and closing it puts the screen to sleep. That feature alone saves battery life and feels like an Apple-level convenience.
What Could Be Better
- Not rugged drop protection
This is a protective everyday case, not a rugged armor shell. If you’re someone who drops your devices regularly or needs heavy-duty shockproof coverage, you’ll want something thicker.
Real-World Usage Notes
• Daily commute: slips easily into backpacks without adding weight
• Typing or viewing: the built-in stand angles (if available for your exact variant) are functional for watching videos or typing notes
• Button/port access: precise cutouts mean no struggle for speakers, USB-C, volume buttons or camera
Verdict…
This ProCase is a great everyday protector for iPad Pro owners who want sleek looks, practical protection, and Apple-like convenience without a huge investment. It’s not bulky or overbuilt. And that’s its biggest strength for most people.
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Reviewed in the United States on February 8, 2026