Upgrade your industrial equipment with these 4 in. heavy-duty caster wheels. They come in a set of 4, with 2 fixed and 2 locking swivel casters. The wheels are made of heavy-duty rubber paired with reinforced iron brackets, ensuring industrial-grade durability. With a total load capacity of 600 KG/1320 lbs., each wheel can independently support 150 KG/330 LBS. The precise dimensions are 4 in. in diameter, 2 in. in thickness, 6 in. in overall height, and a 3.5 in. × 2.4 in. top plate. They offer ultra-smooth, noise-free rotation, making them perfect for workshop use. The 360° swivel top plates allow for flexible direction adjustment, and the non-marking black rubber surface protects floors. Ideal for warehouse trolleys, logistics dollies, mobile workstations, and more. The all-in-one package includes all necessary bolts and nuts, enabling quick and easy installation. Enhance your work efficiency with these high-quality caster wheels. Color: Blacks.