MATERIAL: The threaded stem swivel casters are made of durable thermoplastic elastomer (TPE) and high-quality steel, the surface with chrome plating process is rust and corrosion resistant, which can last for a long time SIZE: The metric size of the threaded stem bolt is 6mm in diameter and 15mm in height (M6×15), the mounting height is about 39.5mm, the wheel diameter is 25mm LOAD CAPACITY: Each caster has a load capacity of 15kg, and the 4-pack casters have a maximum capacity of 60kg, which can carry heavy items. TPE material prevents scratches on your floor and makes it quiet 360-degree rotating: 360-degree swivel casters make it easy to move, and the fixed stem makes it easy to install PERFECT FOR: Suitable for replacing trolleys, kitchen cabinets, storage shelves, laundry carts, coffee tables, workbenches, and other mobile furniture Product Description Why choose our casters? These threaded swivel stem casters are different from traditional rubber casters, which are made of