Features:
1.High quality metal material, it is wearable, and long lasting.
2.Total 10pcs in one pack.
3.Great replacement parts extruder accessories for 3D printer to replace your broken one.
4.This is U- Wheel Pulley Bearing used for 3D printer
5.High precision, smooth, low noise.

Specifications:
Color: Silver
Material: Metal
Inner Diameter: 4mm
Thickness: 4mm
Outer Diameter: 13mm
Depth: 1mm
Width: 2.1mm
Package Weight: Approx. 30g
Quantity: 10Pcs

Package List:
10 x U- Wheel Pulley Bearing