Description: 4 Pcs 1.5 Inch Swivel Caster Wheels PU 360 Degree Threaded Stem Caster Wheel M8 x 25mm. Polyurethane (PU) wheels offer the elasticity of rubber wheels combined with the toughness and durability of metal wheels. Suitable for all floor types. Perfect casters for small equipment and small space furniture including coffee table, plant stands, bookshelves, shoe bins, toy bins, shopping carts, workbench. Note: Each caster capacity is 50kg, total capacity for all 4 casters is 150kg (calculated by 3 casters ). Because when the road is uneven, sometimes there will be only 3 casters bearing weight. Features: Wheel Dia: 40mm / 1.5inch. Capacity: 50kg / 110lb per wheel. Style : Swivel , Threaded Stem. Install Type: Threaded Stem. Thread Dia: 8mm / 0.31inch Thread Length: 25mm / 0.98inch Wheel Material: Polyurethane Color: Black Package Include: 4 x Threaded Stem Caster,4 x threaded embedded parts, 4 x nuts, ,1 x wrench.