SET OF 6 WHEELS: 6-pack x 2.5 inch 360 degree swivel stem casters. Threaded post mounting design, stem size: M10x25mm (D*H), wheel diameter: 2.5 inch. HEAVY DUTY CASTERS: Each swivel caster loads 45 kg. Strong enough and suitable for trolleys, chairs, cabinets or other furniture. With these wheel replacements, you save energy and can easily move the table, chair, shelf or other heavy items. SOFT AND QUIET MOVEMENT: Soft, quiet and non-marking polyurethane swivel casters. With these wheels, you can flexibly move your scaffolding, mechanic's creeper to what you need and easily and steadily fix it. VERSATILE USE: Wheel replacements are widely used for mechanic's creepers, service carts, cabinets, pallets and chairs and more. 2.5 SWIVEL CASTERS: Heavy duty steel axle, rust resistant chrome finish 360-degree swivel casters. For 4-pack, see ASIN B091BSHV2S. For 6-pack, see ASIN B07XF9VS8R. For 12-pack, see ASIN B091BTNJR3.