L-520W02 is an Open Miniature Ball Bearing, L-520W02 Bearing has an inner diameter of 2mm, L-520W02 small Bearing outer diameter is 5mm and L-520W02 Bearing width is 2mm, L-520W02 Bearing is made of Chrome Steel, 52100 is a high carbon, chromium containing low alloy steel, heat treatment and hardening of 52100 alloy steels will get you 60 Rockwell hardness and very common in bearings.

• Item: L-520W02 Bearing
• Bearing Inner Diameter: 2mm
• Bearing Outer Diameter: 5mm
• Bearing Width: 2mm
• Style: Miniature Bearing
• L-520W02 Dimensions: 2mm x 5mm x 2mm
• Size: 2 x 5 x 2 mm
• Closures: Open
• Material: 52100 Chrome Steel
• Standard: Metric
• Quality: Standard Precision
• Quantity: One Bearing L-520W02