PRODUCTS DISPLAY-->PRODUCTS DESCRIPTION-->Features:*The operate of the piston ring is to maintain the air tightness between the piston and the cylinder wall.*With traditional internal and outer diameter size, it's convenient to put in and disassemble.*The for has no casting defects equivalent to cracks, pores, looseness, etc., making certain tight connection.*The equipment consists of 3 replacement piston rings(Including 2pcs balance ring+1pcs seal ring), which may replace the previous or broken ones at the air pump at any time.*Suitable for air compressors and air pumps with a cylinder diameter of 42mm/47mm/48mm/51mm/52mm/65mm/90mm/95mm/100mm, and need to get replaced when the axial clearance is larger than 0.13mm.Specifications:*Item Type: Air Compressor Piston Ring*Compatible for: Air Compressor*Size: As photograph show*Applicable cylinder diameter: 42mm 47mm 48mm 51mm 52mm 65mm 90mm 95mm 100mm, Please Choose the proper size.*Quantity: 3pcsPackage Contents:3 x Air Compressor Piston RingNote:1. The genuine colour of the item may be barely assorted from the pictures proven on web content brought on by many factors akin to brightness of your monitor and lightweight brightness.2. Please enable slight guide size deviation for the data. DETAIL DISPLAY-->