*Key Features *Roll Silently & Smoothly: Experience the smooth operation of a dual ball bearing design. High-quality ball bearings are integrated to resist rust and ensure quiet, effortless rolling. Enjoy seamless mobility with minimal noise. *Heavy Duty Performance: Built with a robust 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 Movement: These casters allow effortless maneuverability in any direction. Spin, turn, and roll with ease, providing smooth movement for office chairs and other equipment. *Height Adjustable and Lockable: Designed for stability and convenience. Easily adjust height or lock the position when needed. Ideal for furniture requiring frequent repositioning. *Premium PVC Construction: Made from high-quality soft PVC material, these casters are molded as a single unit to prevent floor scratches and reduce noise during use. Provides a clean, smooth glide on various surfaces. *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