A set of quality Polini PTFE / FKM crankshaft seals for 50-125cc Vespa Classic geared scooter engines with 20mm crankshaft taper on the flywheel side. 20x32x7mm 22,7x47,05x7 / 7.5mm
Explanation: The difference between FPM, FKM, Viton®
Behind the abbreviations or names mentioned is the identical basic material - fluororubber. FKM is the abbreviation for fluoroelastomers according to the American ASTM standard. Viton®, on the other hand, is a trademark of the company DuPont Performance Elastomers.
In our range, all fluoro rubber articles are designated with the abbreviation FKM.
Explanation: The difference between FPM, FKM, Viton®
Behind the abbreviations or names mentioned is the identical basic material - fluororubber. FKM is the abbreviation for fluoroelastomers according to the American ASTM standard. Viton®, on the other hand, is a trademark of the company DuPont Performance Elastomers.
In our range, all fluoro rubber articles are designated with the abbreviation FKM.
