FLMLF 29CC-30.5CC Engines 36mm Piston Ring Kit For 1/5 HPI Rovan KM BAJA LOSI FG Motor For Zenoah CHONGYANG Engine RC Car Parts One piston, one piston ring, two piston e cards, one piston pin, one needle roller, two wear reduction pads.Please note the size before purchase to avoid incompatibility due to size and save your time.It works under high temperature environment, can resist thermal deformation and maintain stability, and has certain rigidity to withstand high pressure and impact in the cylinder.The piston moves back and forth in the cylinder at high speed, and the contact surface with the cylinder wall and piston ring will be abraded, so we use metal as the raw material, which has good abrasion resistance.Suitable for 29cc 30.5cc gasoil engine,Zenoah, ChongYang, ROVAN ,TOPSPEED RC WORLD GASOIL Engine,for 1:5 HPI Rovan Baja 5B SS 5T 5SC Rc Cars. Strong adaptability, can fit perfectly.We have a professional after-sales team, if you have any questions, please contact us in time, we will solve your problems within 24 hours.