This GT2 timing pulley is a bit interesting – it has two separate pullies for two separate GT2 belts. Synchronously drive two separate shafts in different locations, use it to couple two belts together to make a tight bend, or whatever creative use you come up with! The pulley has 20 teeth and a 6.35mm (1/4″) bore. Use with all forms of 6mm wide GT2 belt we carry in stock.