1 1/4" inch (31.75mm) Ball Bearing with 1/2" inch (12.7mm) diameter integrated 1" inch (25.4mm) Long Axle, Pin Diameter is 1/2" inch, Bearing Outer diameter is 1 1/4" Inch (31.75mm), and Width of the assembly is 1" Inch (25.4mm Long), Bearing is made of Chrome Steel.

• Item: 1/2" x 1 1/4" x 1" Ball Bearing
• Type: Axle Integrated Ball Bearing
• Assembly Dimensions: 1/2" x 1 1/4" x 1" Inches
• Assembly Dimensions: 0.5" x 1.25" x 1" Inches
• Size: 12.7mm x 31.75mm x 25.4mm
• Pin diameter: 1/2" (12.7mm axle diameter)
• Bearing Outer Diameter: 1 1/4" Inch (1.25"=31.75mm)
• Width of the assembly: 1" Inch (25.4mm Long)