Specification:Name: 2GT GT2 Timing PulleyMain Material: Aluminum alloyType: K TypeTeeth Pitch: 2mmFlange : DoubleMaterial: 6061 Aluminium AlloyFixed mode: 2* M4Teeth Number: 16 TeethBore: 3/3.175/4/5/5.5/6/6.35mmBelt Width: 6/10/15mm