4" x 1-1/4" Polymadic Wheel Threaded Swivel Stem Caster (1/2") - 325 lbs. Cap.

4" x 1-1/4" Polymadic Wheel Threaded Swivel Stem Caster w/ Dust Cover The polymadic wheel provides plenty of durability with a firm tread. The polyurethane tread protects surfaces, and the annular bearings roll very smoothly. These wheels work well for most hard-floor applications due to the high-performance UV resistant materials used. Tread: High-Performance UV-Resistant Polyurethane, Non-Marking, Mechanically Locked To Core Core: Polyolefin  Bearing: Annular Ball Bearing Rig: Zinc-Plated Swivel Caster With Swivel Dust Cap, Threaded Stem Capacity: 325 Lbs. Color: Maroon/Gray Durometer: Shore D 60 (+/-5) Temperature Range: -20° F to 180° F Load Capacity 325 Lbs.  Wheel Diameter 4" Tread Width 1-1/4" Tread Type High-Performance UV-Resistant Polyurethane, Non-Marking, Mechanically Locked To Core Core Type Polyolefin Bearing Type Annular Ball Bearing Wheel Color Maroon/Gray Overall Height 5" Swivel Radius 3-7/16" Stem Size 1/2" - NC13 x 1-1/2" Threaded Stem  Durometer Shore D 55 (+/-5) Temperature Range -45° F to 180° F