XIKE 6004 2RS Sealed Ball Bearings 20x42x12mm Chrome Steel and Pre lubricated 6004RS Deep Groove Bearing with Double Rubber Seals, Pack of 4.

6004-2RS 20 mm inside diameter, 42 mm outside diameter, 12 mm width Chrome steel is manufactured to be strong and durable Shielded bearings effectively prevent dust from entering Reduce parts cost and replacement frequency Suitable for use in DIY, 3D printers, industry, agriculture, engineering and everyday leisure activities