Non-standard chains, silent chains, special conveyor chains. Inquiry now for specifications! Non-standard chains, silent chains, special conveyor chains. Silent Chains: CL04, CL06, CL08, CL10, CL12, CL16, CL20, CL24 ... , 630, 630H;10. Engine Mechanism chains (Timing Chains)11. Self-tooth-forming chains: PIV infinitely variable speed chains; Roller type infinitely variable speed chains12 ...