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Pulley bearing U-shaped_black

Design :

These Pulley Rail Ball Bearings adopts with a U-shape groove design, which have smooth surface to reduce friction–These Pulley Rail Ball Bearings adopts with a U-shape groove design, which have smooth surface to reduce friction.

Scope of application :

Ideal for replacement roller of sliding window, door, printer machine etc.

Size:

Shaft Hole Diameter: 8mm/0.31inch,