Description: Pulleys have 40 Teeth with 2mm pitch. Fits for 2mm Tooth pitch and 6mm wide belts. Suitable for x axis and y axis drive of 3D printer. Fine workmanship and high transmission accuracy. Made of high quality Aluminium alloy. Package Includes: 1 Piece Timing Belt Pulley Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks !