ROLLER CHAIN COUPLING 1.Steel-Black Oxide Finish,Stainless Steel 2.ISO 9001:2008 certified. 3.OEM servic CHAIN COUPLING 5016 Coupling No:3012,4012,4014,4016,5014,5016,5018,6018,6020,6022,8018,8020,8022,10020,12018,12022TYPE A:06B,08B,10B,12B,16B......TYPE B:06B,08B,10B,12B,16B......TYPE C:06B,08B,10B,12B,16B...... modelRoller chainBore dimChain sizeNMweightOuter covering sizeweightminmaxLISDOCkgf ...