Material: Galvanized iron Color: Silver Ball material: Nylon Ball diameter: 16 mm (0.63 inch) and 25 mm (0.98 inch) Dimensions: 48 x 32 x 20 mm (L x W x H) for 16 mm, 75 x 50 x 30 mm (L x W x H) for 25 mm Package includes: 4 x Roller transfer units 8 x Screws - The package includes 4 nylon furniture casters, 8 screws, and a round ball transfer with 16 mm or 25 mm diameter. Compact design allows installation in tight spaces. Equipped with two mounting holes for secure screw attachment. - Constructed from galvanized carbon steel for durability. Resists scratches, corrosion, and rust. Designed for long-lasting performance. - Features a 360-degree rotating ball for smooth, flexible movement. Enables effortless shifting of items, improving efficiency and saving time. Each caster supports up to 15 kg, suitable for a wide range of applications. - Precision polished surface ensures quiet operation. Ball bearing mechanism allows for smooth and noise-free rolling during use. - Ideal for both household and industrial use. Commonly used with sofas, display cases, carts, shelves, cabinets, kitchen appliances, scooters, conveyor systems, power equipment, packaging machines, and auxiliary machinery.