L-730 is an Open Miniature Ball Bearing, L-730 Bearing has an inner diameter of 3mm, L-730 small Bearing outer diameter is 7mm and L-730 Bearing width is 2mm, L-730 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-730 Bearing
• Type: Radial Miniature Ball Bearing
• L-730 Dimensions: 3mm x 7mm x 2mm
• Material: 52100 Chrome Steel
• Standard: Metric
• Size: 3 x 7 x 2 mm
• Closures: Open
• Quality: Standard Precision
• Bearing Inner Diameter: 3mm
• Bearing Outer Diameter: 7mm
• Bearing Width: 2mm
• Quantity: One Bearing