1/2" inch (12.7mm) Ball Bearing with 1/8" inch (3.18mm) diameter integrated 3/8" inch (9.53mm) Long Axle, Pin Diameter is 1/8" inch, Bearing Outer diameter is 1/2" Inch (12.7mm), and Width of the assembly is 3/8" Inch (9.53mm Long), Bearing is made of Chrome Steel.

• Item: 1/8" x 1/2" x 3/8" Ball Bearing
• Type: Axle Integrated Ball Bearing
• Assembly Dimensions: 1/8" x 1/2" x 3/8" Inches
• Assembly Dimensions: 0.125" x 0.5" x 0.375" Inches
• Size: 3.18mm x 12.7mm x 9.53mm
• Pin diameter: 1/8" (3.18mm axle diameter)
• Bearing Outer Diameter: 1/2" Inch (0.5"=12.7mm)
• Width of the assembly: 3/8" Inch (9.53mm Long)