3 1/4” x 2” Heavy Low Profile Swivel Caster Wheel – Featuring a glass-filled nylon wheel with ball bearings, this swivel caster provides smooth 360° rotation and reliable durability. With a top plate size of 4” x 4½” and a weight capacity of 900 lbs, it’s ideal for low-profile applications, heavy-duty carts, work platforms, and industrial equipment requiring strong, stable mobility.