*Key Features* Roll Silently & Smoothly: Experience smooth and quiet operation with a dual ball bearing design. High-quality ball bearings are built in to help resist rust and ensure quiet, effortless rolling. Heavy Duty Performance: Built with a strong carbon steel bracket and a thickened structure for enhanced strength and durability. Each caster supports up to 180 pounds, making them suitable for heavy loads. 360-Degree Swivel: These casters provide full rotational movement for easy maneuverability. Move office chairs or equipment smoothly and effortlessly. Height Adjustable & Locking Function: Designed for stability and convenience. Easily adjust height as needed. Secure casters in place when stationary use is required. Soft PVC Treads: Made from high-quality soft PVC material, these casters are molded in one piece to help prevent floor damage and reduce noise during movement. Specifications Item Model Number: FJ-3C Product Size: 5.82 x 2.51 x 4.13 in / 148 x 64 x 105 mm Product Weight: 8.22 lbs / 3.73 kg Max Load Per Caster: 180 lbs / 82 kg Installation Height: 4.15 in / 105 mm Number of Casters: 4 Caster Diameter: 3 in / 76.2 mm Caster Axle Diameter: 0.35 in / 9 mm Caster Width: 1.25 in / 32 mm Material: PVC Package Content 4 x Caster Wheels 16 x M6 Screws with Flat Washers 16 x M6 Nuts 1 x Pair of Cotton Gloves 1 x Screwdriver 1 x Wrench 1 x User Manual