PACKAGE: Included 4 casters（Stem Diameter 1/2", Stem Length 1-1/2"）BIG TIRE: 3'' Diameter WheelLOAD CAPACITY: Total 720 lbs (180 lbs each caster)MATERIALS: Premium Rubber/ SteelUNIVERSAL:Perfect casters replacement for your wire rack shelving units. Also It can make your workbench, freezer, grill, fire pit, cooler, washer, dryer,grinder/ drill press stand,any other gadget you need move easily and roll smoothly, which save your labor and time. Product Description Finnhomy Swivel Caster Wheels-Heavy duty, durable and anti-wear. Perfect caster wheels replacement for your wire rack shelving units. Also It can make your workbench, freezer, grill, fire pit, cooler, washer, dryer,grinder/ drill press stand,any other gadget you need move easily and roll smoothly, which save your labor and time. The structure chart of 1/2"- 13x1-1/2" : Package content: 4 x Caster Wheels with ScrewsMaterial: Rubber and SteelWheel Size: 3'' DiameterBearing: RollerFeatures: Heavy duty, durable and anti-wear With Braking NO NO NO Wheel Size 3 INCH 3 INCH 3 INCH 3 INCH 4 INCH 4 INCH Stem Size 3/8"- 16x1" 3/8"- 16x1" 1/2"- 13x1" 1/2"- 13x1" 3/8"- 16x1" 3/8"- 16x1" Quantity 4 4 4 4 4 4 Load Capacity of 4 2200 lbs 2200 lbs 2200 lbs 2200 lbs 2200 lbs 2200 lbs With Screws 360° Rotation with Braking NO NO NO Stem Size 5/16" -18 x 1" 5/16" -18 x 1" 3/8" -16 x 1" 3/8" -16 x 1" 1/2" -13 x 1" 1/2" -13 x 1" Quantity 4 4 4 4 4 4 Load Capacity of 4 800 lbs 800 lbs 800 lbs 800 lbs 800 lbs 800 lbs With Screws 360° Rotation Wheel Size 2 Inch 2 Inch 2 Inch 2 Inch 2 Inch 2 Inch With Braking NO NO NO Size 2 Inch 2 Inch 3 Inch 3 Inch 4 Inch 4 Inch Quantity 4 4 4 4 4 4 Load Capacity of 4 800 lbs 800 lbs 2200 lbs 2200 lbs 2600 lbs 2600 lbs With Screws 360° Rotation With Braking NO NO NO Stem Size 5/16"- 18x1" 5/16"- 18x1" 3/8"- 16x1" 3/8"- 16x1" 1/2"- 13x1" 1/2"- 13x1" Quantity 4 4 4 4 4 4 Load Capacity of 4 800 lbs 800 lbs 800 lbs 800 lbs 800 lbs 800 lbs With Screws 360° Rotation Wheel Size 2 inch 2 inch 2 inch 2 inch 2 inch 2 inch