Features:
Made of high quality material, these pulleys are durable, sturdy and portable.
Internal lubrication grease, smooth operation, good silence effect.
U-shaped groove design, smooth surface reduces friction.
There are a total of 4 pieces of pulleys in one set that you can use for many projects.
Widely used in doors and windows to track and drive mechanical equipment.

Specifications:
Model No.: 0840UU
Type: U-slot
Material: metal, plastic
Color: Black
Inner diameter: 8 mm / 0.3 in
Outer diameter: 40 mm / 1.6in
Thickness: 20.7 mm / 0.8in
Quantity: 4 pieces
Weight: 108g (approx.)

Package includes:
4 x pulleys