20pcs 624ZZ HCS U Groove Guide Pulley Rail Ball Bearings Wheel 4137MM Sliver

Features:
U groove Sealed Ball Bearings
This item is ordinary precision, adaptation to low speed, low load applications

Specifications:

Type: 624UU
Size: (ID)4mm x (OD)13mm x (thickness)7mm
U groove: 4.5mm(width), 1.7mm(depth)
Material: high carbon steel








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