ITEM NAME:20t 5mm Bore Twomm Pitch Stainless Steel Pulley img *{margin:0;padding:0;.1 x Pulley Gear Wheel. Pitch:2 (mm). Bore:5 (mm). Material: Stainless steel. It gives better smoothness and accuracy of positioning, resulting in better printing quality. SKU: SVZ0126317619303709. Tooth length: 7MM.