(1)GT2 Timing pulley Features: The GT2 pulley with 20 teeth or grooves is one of the best choices for 3d printer construction. Compared with the T2.5 or MXL timing pulley, the GT2 pulley tooth profile is anti-backlash. Why? The rounded teeth of this tooth and belt are engaged together longer providing a smoother transition between teeth. (Fit for reprap, Prusa, MendelMax)
(2)20Teeth GT2 Timing Pulley Specs: Type:20-2GT-6 BF Pitch:2mm Teeth Number:20 teeth Flange:double Material:Aluminium Alloy Fixed mode: 2* M4 Bore of Timing pulley:6mm Teeth width:7mm Fit for Width of timing belt :6mm
(3)Package Listing Includes as Follow: 5pcs x 20 Teeth GT2 Aluminum Pulley 10pcs x M4 setscrews 1pcs x Allen Key