Medium-Duty 3-1/2In Stem Caster With Brake Black Polyolefin Wheel And Hub Castr Brake: Yes Castr Type: Swivel Color: Black Wheel And Hub Load Capacity: 454 Kg Per Set Of 4, 1000 Lb Per Set Of 4 Load Heght: 4-1/2In, 114 Mm Material(S): Polyolefin Wheel And Hub Mounting Stud Size: For 1-5/8In Tubing Mounting Type: Stem Type: Medium-Duty Weight: 1.838 Lb Wheel Diameter: 3-1/2In, 89 Mm Wheel Width: 1-1/4In, 32 Mm