Constant Pinion Number of Teeth : 30 Model Number : 5M30T Material : Alloy Type : Timing Teeth pitch: : 5 mm Pulley shape: : BF shape Inner bore: : 6/6.35/8/10/12/14/15/16/17/19/20 mm Slot width: : 16/21 mm Belt width: : 15/20 mm