8mm U Groove Ball Bearing 0840UU Groove Guide Pulley Sealed Rail Ball Bearing 8*40*20.7mm

U type pulley, the internal bearing fine bearing steel. Strong bearing capacity, flexible rotation,
internal upgrade stainless steel bearings, can be used in the wet environment, not rust

Specifications:
Material:nylon+Bearing
:black
Inner diameter:8mm
Outer diamter:40mm
Width:20.7mm

Features:
●Load more than 50KG, smooth operation, good mute effect
●Internal lubrication grease , can be used in the wet environment, not rust
●Widely used in doors and windows to track and drive mechanical

Package include:
2x wheel bearing


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