Piaggio scooter 50cc Polini crankshaft seal

Seal from the manufacturer Polini, they are the perfect replacement in case the originals fail. Made of FKM (Fluorocarbon rubber) to withstand high temperatures, they have a PTFE (Polytetrafluoroethylene) coating for greater durability. 

Although they have been designed for competition use, they are perfectly suitable for use outside of it, as the requirements and the stress they are subjected to are lower.