3/8" Ball Bearing - 1/4 diameter integrated 7/8 Long Axle Inner Diameter - 40mm outer diameter is 4mm and

outer diameter is 4mm and width is 2mm

SWK4 NB Bearing

Machined type needle roller bearing NK9/16

NU207MY width is 17mm

Inner Diameter (ID): 1/4"

3/8" Ball Bearing - 1/4 diameter integrated 7/8 Long Axle Inner Diameter - 40mm outer diameter is 4mm and3 8" Inch Ball Bearing with 1 4" diameter integrated 1 4" Inch (6. 35mm) Pin Diameter 1 4" x 3 8" x 7 8" Inch 3 8" inch (9. 525mm) Ball Bearing with 1 4" inch (6. 35mm) diameter integrated 7 8" inch (22. 23mm) Long Axle, Pin Diameter is 1 4" inch, Bearing Outer diameter is 3 8" Inch (9. 525mm), and Width of the assembly is 7 8" Inch (22. 23mm Long), made from durable 52100 alloy steel, commonly known as chrome steel. 1 4" x 3 8" x 7 8" Ball Bearing