These 3D printer bearing wheels are made of nice material, are professional and practical, and work smoothly and stably. Suitable for most DIY 3D printers. The movement is smooth and the printing accuracy is high, which can increase the printing speed and bring you more convenience. Features - Color: Transparent -Material:Plastic,steel - Size: 2.40X1.10X1.10cm/0.94X0.43X0.43in -Inner hole:5mm -These 3D printer wheels are smooth surface, professional and practical, and work stably. -Silent design, low friction, stable and bearing wheels, safe to use. -Brings good working performance to most DIY 3D printers, with certain versatility. -Smooth movement, high printing accuracy, can greatly increase printing speed, and is a practical accessory for 3D printers. -Outstanding workmanship, reasonable design, stable and practical, will bring you a good use experience. Package list: 4 x printer pulley wheels