General description These 5.1 cm PU door wheels feature a spring-loaded design that allows for automatic height adjustment on uneven surfaces, ensuring smooth opening and closing of doors with minimal noise. Made from high-quality alloy and PU rubber, these wheels provide excellent shock absorption, wear resistance, and stability. Technical specifications Wheel diameter: 5.1 cm Maximum load capacity: 60 kg Material: High-quality alloy and PU rubber Installation Universal mounting plate with 4 holes for easy attachment to wooden doors or along horizontal or vertical guide tubes. Usage Suitable for sliding gates, carts, storage shelves, flight cases, toolboxes, speakers, cabinets, amplifiers, equipment racks, and various furniture.