SMC Shuttle Tandem Cable Pulley 3 Sigma MBS: 26kN 5,845 lbf. Sheave: 2'' Stainless Steel Uses four high efficiency sealed stainless steelball bearings and is designed to function flawlessly under conditions that would shut down lesser grade pulleys. Max. Rope: 1/2'' (13mm) Multiple independent attachment points Fits up to 13mm cable