- Product type and options - Iron core polyurethane running roller available in 2.5 inch, 3 inch, 4 inch, and 5 inch diameters. - The 4 inch version is a brake PU swivel wheel with medium hardness and red color. - Key benefits - Brake function provides control of movement and stable positioning when needed. - Polyurethane wheel delivers wear resistance and smooth operation for daily use. - Iron core offers added structural strength for reliable performance under load. - Red color enhances visibility for safer operation. - Specific details for the 4 inch option - Diameter: 4 inch - Function: brake enabled for controlled stopping and parking - Hardness: medium - Color: red - Material and construction - Wheel material: polyurethane for wear resistance and smooth rolling - Core material: iron for strength and durability - Use scenarios - Industrial carts and trolleys in warehouses: use the brake to hold position when loading or unloading to prevent drift. - Mobile workstations and tool carts in workshops: swap between steering and parking with the brake engaged for stability. - Light machinery transfer carts on manufacturing floors: swivel for easy maneuvering, then brake to secure the cart during setup or transfer. - Compatibility and applications - Suitable for equipment and carts that require a 4 inch brake PU swivel wheel with an iron core and red finish. - Also available in smaller and larger diameters (2.5, 3, 5 inch) to fit various mounting standards and load requirements.