English Description: Professional 3", 4", 5" medical-grade single castors with swivel rotation and total brake system, ideal for hospital beds, trolleys, or medical carts. Features threaded stem for secure screw-fix installation, heavy-duty nylon wheels, and corrosion-resistant materials. Ensure smooth 360 mobility and instant braking for safety in clinical environments. Key Features: Sizes: 3", 4", 5" single-wheel design for versatile applications. Swivel Total Brake: Effortless maneuverability + full lock stability. Threaded Stem: Durable screw-mounting for long-term reliability. Medical-Grade: Rust-proof, easy-clean, compliant with hygiene standards. Perfect for medical equipment, lab trolleys, or mobility aids requiring precision control and safety. Suitable for loads up to per castor.