Piston kit for Gasgas EC250 and Reijo MR300 There are 3 sizes. Composition: • High quality aluminum-silicon alloy • Cast or forged • Molybdenum disulfide protective layer. • Equipped with nitrided steel rings Features: • Lightweight and durable • Limits vibrations • The engine will build up faster Kit includes: • 1 - piston • 2 - rings • 1 - pin • 2 - coupling clips