Rubber Swivel Caster Wheels, Set of 4 with Brakes, Size M8 Key benefits Quiet and smooth movement: Nonmarking rubber tread with builtin bearings delivers silent rolling and reduces vibration for a smoother ride. Protects floors: Soft, nonmarking rubber is safe for wood, tile, vinyl, and rugs while resisting scuffs and scratches. Secure and stable: Ball bearings plus a doublelocking brake system increase load stability and lock the wheel and swivel for safe stationary use. Long service life: Dual dust covers on both sides prevent dust and hair from entering the bearing area, reducing wear and maintenance. Features Set contents: Four swivel casters, each equipped with a brake. Size and compatibility: M8 size with metric thread options 8 mm and 6 mm; universal ball shaft design for broad compatibility. Load capacity: 40 kg (per caster). Construction: Rubber rolling surface with durable metal core, builtin bearing, precision manufacturing for silent performance. Floor friendly: Designed for use on wooden floors, rugs, tiles, and other common surfaces. Practical applications Office chairs and desks: worn casters to reduce noise and protect flooring while maintaining mobility and lockable stability. Mobile storage and utility carts: Smooth rolling and secure brakes keep equipment stable during loading and unloading. Display stands and compact workstations: Move items easily between locations and lock them securely in place when needed. Quick installation and maintenance Installation uses metric threaded stem (M8; 8 mm or 6 mm thread), compatible with many furniture and equipment fittings. Low maintenance thanks to builtin bearings and dust covers; periodic cleaning of the wheel surface is usually sufficient. Specifications summary Set: 4 swivel rubber casters with brakes Thread size: M8; metric thread 8 mm / 6 mm Load capacity: 40 kg Materials: Nonmarking rubber tread, metal core, builtin bearings Special features: Double locking brake, universal ball shaft, dust covers both sides, silent operation These casters combine the flexibility and floor protection of rubber with the durability and load handling of metal components, making them suitable for a wide range of indoor mobility needs.