... price 2.Wearable&positive feedback... 3.Alloy spring steel. 1. Motorcycle piston ring 2.we can supply all kinds of SIZE ... .5mm, +1.0mm ,+1.5mm etc.3.we have other motorcycle rings .for example : CG125 ,CG150,CG175. EN125,GS125, SRZ150. GY6 ... -50,GY6-60,GY6-80,GY6-125,GY6-150 ,AX100,CG200,CBT125,QJ150J,CA250,XV250,QJ50-18,QJ50-10A, ,CH125 ...