Complete musical organization of precision-molded, low-friction composite gear pulleys + covers and collars molded from specially-formulated graphite composite combination for increased power and reduced fat. Perfect stability between reliability and satisfaction. Includes these pulleys (being furthermore available separately as additional elements): #345800-G Composite Belt Pulley Cover Set - Graphite #345820-G Minimal Friction C. 2-Speed Belt Pulley 20T - Center – Graphite #345838-G Minimal Friction Comp. Component Belt Pulley 18T o8 - rear – Graphite #345858-G minimal Friction C. Front Belt Pulley 18T o6 - Center – Graphite #345888-G minimal Friction Comp. Component Belt Pulley 28T - Front – Graphite #345889-G Minimal Friction Comp. Part Belt Pulley 29T - Front – Graphite