... , Graphite , Oil cooling channel , Sn(tin) plated , Steel Piece , Top Oxidization , Skirt Graphite Printed , Three or Four Ring Grooves ,Ceramic SprayingREMARK:1 ... .4C: Pin Dia: 34.94 Length:88 RemarkSn plated on skirt Belarus(MTZ)C/F-NoE-ModelOEM NoPiston SizeOEM NoRing SizeOEM ...