SKU: 41371421355

CETMA Composites Mantra Carbon Fin Blades

Sale price$238.48 Regular price$264.98
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Ships within 48 hours · Estimated delivery Aug 22 - Aug 27

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Description

CETMA Composites Mantra Carbon Fin BladesCETMA Composites Mantra Carbon Fin Blades These high end carbon blades are the result of Cetma Composites engineering approach to the development and manufacturing process of freediving and spearfishing fins, coupled with years of material studies and experience in the design of composite materials for the aerospace and automotive industries. 100% IM7 carbon fiber: Material used is 100 % Carbon Prepreg produced with hot melt impregnation system, using

CETMA Composites Mantra Carbon Fin Blades

 

These high end carbon blades are the result of Cetma Composites engineering approach to the development and manufacturing process of freediving and spearfishing fins, coupled with years of material studies and experience in the design of composite materials for the aerospace and automotive industries.
  • 100% IM7 carbon fiber: Material used is 100 % Carbon Prepreg produced with hot melt impregnation system, using a micro-toughened tetra-functional epoxy resin. 
  • 3D-Tech: Proprietary Technology, of CETMA COMPOSITES exclusive know-how, with high pressure, high temperature and high degree of applied vacuum, which lead to a component with 0% void level, without defects, with a uniform matrix/reinforcement ratio across the whole blade. 
  • FEM Design: MANTRA blades are optimized through an accurate Design by means of Finite Element Softwares (FEM). The Design through FEM software allows an optimized distribution of the stiffness, with the aim to obtain a deformation ensuring the maximum hydrodynamic efficiency.
  • Signature model: developed in collaboration with the world champion CWT bi fins Michele Giurgola.
  • DRS (Dynamic Resonance System) innovative and exclusive CETMA COMPOSITES system. DRS implies that MANTRA blades were designed to reach in resonance in a definite frequency of kick. Resonance phenomenon is well note physical phenomenon characterizing all the structures. Simplifying, when a structure is forced with a frequency close to its natural frequency the amplitude of vibration increase in a very efficiency way (low damping). Operating by distribution of the stiffness along the blade we “tuned” the blades to certain natural frequencies. So when the blade is driven, by kicking, with a certain frequencies range the user feeling is a very low effort with an outrageous thrust. This study is done using a laser vibrometer (LDV) to perform a modal analysis, which helps in a stiffness distribution design of the blade.
  • Available colors: White, Magenta, Gold.
  • Available stiffness: super soft (XS), soft (S), medium (M). 
  • Dimensions: Width 195 mm; Length from the bending angle 742 mm; bending angle 33 degrees.
  • Footpocket fitting: CETMA COMPOSITES, Mares and Pathos.
  • Water rail: CETMA COMPOSITES Water rails with variable height and high efficiency.
  • Warranty: 2 years on carbon parts; 5 years if fitted with CETMA COMPOSITES footpocket 
  • Prizes and awards: Italian Champion 2016 CWT bi-fins - 92 meters in 2 minutes and 55 seconds.
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: 41371421355

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Amazon Customer
Lexington, US
★★★★★ 4
Top Notch
Color: Khaki
The size is perfect for my wrist, needed a solar watch for work in rural law enforcement, rechargeable watches weren't cutting it & frustrating when drained, so far this watch works for me, inexpensive so if damage no worries, the design is nice, the display is bright day or night so I can see it. The wrist band is a solid fit. The alarm is loud, if your looking for a work watch to save your quality watches this is for you. I recommend this watch.
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Reviewed in the United States on May 6, 2026
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Gene
New York, US
★★★★★ 5
Excellent value.
Color: Black
I wanted an inexpensive “work” watch so I could keep my “good” watches from getting beat up. This one is an excellent choice…solar so no battery to replace. Bright light function for night time check. No analog function is the only downside for us old folks. Overall a bargain! 👍
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Reviewed in the United States on February 23, 2026
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New eagle
Phoenix, US
★★★★★ 5
Sturdy.
Color: Brown (Passcase)
Nice wallet. Well built. Comfortable. I definitely recommend this item.
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Reviewed in the United States on May 23, 2026
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Rachel S.
Birmingham, US
★★★★★ 5
High quality wallet
Color: Brown (Trifold)
Very nice leather wallet. The durability is great. Long lasting wallet at a great price!
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Reviewed in the United States on May 11, 2026
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Bonnie L. Lee
Dallas, US
★★★★★ 4
Carharrt Quality
Color: Brown (Passcase)
I purchased this bifold wallet approximately about a month ago for my husband. It seems to have the trusted durable Carharrt quality, but it hasn’t been long enough to review its durability. It’s very nice looking. I gave it a four star due to he did find it stiff & tight fitting at first, it didn’t fit all that he had in his old wallet. I’m sure with time as with any leather it will soften.
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Reviewed in the United States on April 27, 2026

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