55mm (2.16") Euro-Style Floor Protective Twin Wheel Caster with 7/16" Grip Ring Stem - 75 Lbs Capacity

55mm (2.16") Euro-Style Twin Wheel (Floor Protective) Furniture Caster with 7/16" Grip Ring Stem - Part # 8PHG5558BK-U This twin wheel furniture caster works great on chairs and other light duty applications. The polyurethane tread wheels work best on hard floor surfaces, like hardwood and tile, are are designed to protect floors from damage. For carpet floor surfaces, we recommend using nylon wheel casters. These products will have the term "Carpet" in the title or description. For this same caster with wheels for carpet, check out this option: 8PHG55058BK Matching adapters and inserts for this mounting stem can be found here - Adapters & Inserts Specifications: Load Capacity (lbs.): 75 Tread Material: Polyurethane Wheel Diameter: 55mm (2.165") Rig Color / Material: Black Nylon Mounting Height: 2-17/32" Swivel Radius: 2-9/16" Fastener: 7/16" Wide x 7/8" Long Grip Ring  Weight (Lbs): 0.29