*Key Features *Roll Silently & Smoothly: Experience the benefits of a dual ball bearing design. High-quality ball bearings are embedded for smooth operation and rust resistance, allowing caster wheels to glide quietly and effortlessly. *Heavy Duty Performance: Designed with a robust carbon steel bracket, these heavy-duty wheels feature a thickened structure for enhanced strength and durability. Each caster supports up to 180 pounds, with a total capacity of 720 pounds for four casters. *360-Degree Swivel Movement: Equipped with a full swivel mount, these office chair wheels provide effortless maneuverability. Rotate and roll smoothly in any direction, making it easy to move equipment or furniture. *Adjustable Height Functionality: Features a locking mechanism for stability and easy height adjustment. Secure the position when needed and release for mobility—designed to adapt to changing requirements. *Soft PVC Construction: Made from high-quality soft PVC material, these casters are molded as a single unit to ensure quiet operation and prevent floor damage. Provides smooth gliding without leaving marks on floors. *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