uxcell Swivel Fixed Casters 1.5 Inch PU M10 x 25mm Threaded Stem Caster Wheels, 330lb Total Load Capacity, Pack of 4 (2 Pcs Swivel, 2 Pcs Fixed with Brake) Wheel Dia: 40mm / 1.5inch ; Capacity: 50kg / 110lb per wheel ; Style: Swivel (no Brake), Fixed (w Brake). Thread Dia: 9.7mm / 0.38inch ; Thread Length: 25mm / 0.98inch; Wheel Material: Polyurethane. Install Type: Threaded Stem ; Color: Black ; Package Content: 2 x Swivel Wheel, 2 x Fixed Wheel. 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.