Complete group of precision-molded, low-friction composite gear pulleys + covers and collars molded from specially-formulated graphite composite combination for increased power and reduced weight. Perfect stability between reliability and gratification. Includes these pulleys (that are additionally available individually as spare components): #345800-G Composite Belt Pulley Cover Set - Graphite #345820-G Minimal Friction C. 2-Speed Belt Pulley 20T - Center – Graphite #345838-G Low Friction Comp. Side Belt Pulley 18T o8 - backside – Graphite #345858-G Low Friction C. Front Belt Pulley 18T o6 - Center – Graphite #345888-G minimal Friction Comp. Part Belt Pulley 28T - Front – Graphite #345889-G Low Friction Comp. Side Belt Pulley 29T - Front – Graphite