PACKAGE: Included 4 x 3” Casters; 4 x φ22mm Rubber Sleeves; 4 x φ25mm Rubber Sleeves; 4 x Hex Nut and 1 Spanner. ADJUSTABLE EXPANDING STEM CASTER: Wheels’ stem is widely fit for inner diameter 7/8" and 1" tube leg of stainless steel kitchen prep work tables/ furniture legs. Expanding casters come with φ22mm rubber sleeve assembled, just replace the φ25mm rubber sleeve if you use them to 1” ID tube. MATERIALS: Premium Polyurethane + Heavy Duty Thickened Steel. Make the wheels Anti-wear, Shock-absorbent and Silence. Rolls smoothly and have no mark over tiles, cement, carpet and hardwood floors. Perfect casters assistant use in the commercial kitchen environment. BIG TIRE & HIGH LOAD CAPACITY: 3'' Diameter and 32mm Thickened Wheel; Total Load Bearing 2200 lbs (550 lbs each caster) UNIVERSAL: Widely used on stainless steel meat cutting/BBQ work table, workbench, commercial kitchen pre table, drafting table as well as any other furniture table legs that are hollow and are 7/8 " or 1" diameter inside. 360° swivel casters feature flexible and precise mobility, move easily and roll smoothly. Save your labor and time. Finnhomy 3 Inch Caster Wheels Prep Table Caster Set of 4 Expanding Stem Wheels Heavy Duty Fit 7/8" and 1" Tube Leg Industrial Swivel Castor Wheels for Stainless Steel Table/ Cart/ Worktable Leg, Black