MaterialThe small mini roller is made of pure copper, and the screw shaft is made of galvanized iron with hardness. Brushed surface treatment, not easy to rust, retro style, bright colors, beautiful and fashionable, exquisite workmanship, strong and thick, durable. Dimensions: Caster diameter: 32mm, total height: 78mm, screw height: 30mm, screw diameter: 7mm, four casters can support 150kg/330 pounds. Easy to install: a pack of 4 brass . Screw installation. Suitable for reinforcement and decoration of various furniture and cabinets. If you like DIY, it will be a great experiee, no matter where the casters are installed, they are very attractive. Casters and Wheels are Widely Used: are widely used in furniture, workbeh, carts, dolly, behes, suitable for indoor and outdoor, it is a mobile expert. Polyurethane Material: Our castor wheels will never scratch, smudge or damage your floors. Enjoy a carefree, safe glide across wood, hardwood, laminate, vinyl, tile and carpet floors all day long.. Good for all Floors: Our ball castors don't damage your expensive hardwood floor, it could not leave a track on your floor.