Plastic pulley--internal grease, smooth operation, mute effect, smooth surface reduces friction, Clear Pulley; 3d printer pulley--with this design your printer will get and precise prints result, 3D Printer Roller Wheels; Printer roller wheel--these pulley bearings have motor ball bearings, to, wear, excellent rub resistance and work smoothly, Pulley Wheel; Ball bearings wheel--the plastic roller bearing is a passive round model pulley for 3d printer, 3D Printer Parts; Passive round wheel--these pulley bearings are used for 3d printers, replacement parts for 3d printers, Bearing Pulley

What's in the box
3 x 3D Printer Accessories