Description: _x000D_ This synchronous aluminum belt pulley is designed for 3D printer. It is an 3D printer accessory for 6mm wide belt with 20 teeth. As an synchronous pulley wheel, you will find it perfect for 3D printer or similar projects. _x000D_ _x000D_ _x000D_ Features: _x000D_ Adopt high quality aluminum alloy, excellently machined, finished smoothly. _x000D_ This pulley is for 6mm width 2GT timing belt. _x000D_ 2pcs M3 keyhole placed in 90 degree angle. _x000D_ Each of the two sides of the wheels were mounted bearings. _x000D_ Perfect choice for building a 3D printer or similar projects._x000D_ _x000D_ _x000D_ Specifications:_x000D_ Material: Aluminum Alloy_x000D_ _x000D_ Height: 16mm / 0.629" _x000D_ Outer Diameter: 16mm / 0.629"_x000D_ _x000D_ Inner Diameter: 8mm / 0.314"_x000D_ _x000D_ Belt Width: 6mm / 0.236" _x000D_ Quantity: 2_x000D_ _x000D_ Weight: 10g(approx.)_x000D_ _x000D_ _x000D_ _x000D_ Package Includes:_x000D_ 2 x Belt Pulleys _x000D_ _x000D_ _x000D_ Note:_x000D_ 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding._x000D_ 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 1Adopt high quality aluminum alloy, excellently machined, finished smoothly 2This pulley is for 6mm width 2GT timing belt 32pcs M3 keyhole placed in 90 degree angle 4Each of the two sides of the wheels were mounted bearings 5Perfect choice for building a 3D printer or similar projects