EY20 PISTON Used for Robin engine Dia: 67mm Competitive Price & Good Quality ROBIN EY20 PISTON1.) Technical DetailsBore: 67mmTotal Length: 56mmPiston Pin: 14*53mmPiston Ring: 2+2+2.8mm2.) Material: High Strength Aliminum Alloy, such as AC8A & ZL1093.) One-Stop Service, Other EY20 engine parts is also available EY20 Piston Assembly, For Robin Gasoline Engines