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 10 - Aug 15

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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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4.2 ★★★★★
Based on 13 reviews
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A
Verified Purchase
adam
Alexandria, US
★★★★★ 1
does not fit a 330ci
Color: Matte Black, Size: For 1999-2002 E46 Coupe Cabriolet Pre-LCI
doesn't fit
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2023
J
Verified Purchase
Josh
Grantham, US
★★★★★ 1
HONEST REVIEW: Dont waste your money: 2001 330Ci (pre-LCI)
Color: Matte Black, Size: For 1999-2002 E46 Coupe Cabriolet Pre-LCI
I tried these because the reviewer's pictures look like these would work. I will assume the integrity of the reviewer and their word that the grills in the pictures are legitimately this brand grills. Which means something terrible happened to the manufactures molds from the time the reviewer got theirs to the time I received mine. I ordered the correct ones for my pre-facelift model and the quality looked promising however the top edge was inset about a 1/4 inch from the OEM one and they wiggled around to the point that there was NO CHANCE of them staying in on the way out of my garage. Don't waste your time and money. Just spend the extra $50 to get the ones from bimmerworld.
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Reviewed in the United States on September 19, 2024
H
Verified Purchase
Holly Rowe
Los Angeles, US
★★★★★ 5
Fits like factory
Fits as should. No issues installing
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
A
Verified Purchase
Aaron Schroeder
Bozeman, US
★★★★★ 5
Fit well
All good
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Reviewed in the United States on January 20, 2026
A
Verified Purchase
Amazon Customer
New York, US
★★★★★ 5
Fits Avis
Fit our Avis side by side perfectly
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Reviewed in the United States on March 27, 2026

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