The Service Caster Series #30 is ideal for a wide range of applications, such as dollies, platform trucks, warehouse carts and freight terminals. Finishes are available in either zinc plating, which provides durability under any condition, or stainless steel, which resists rust and corrosion in indoor or outdoor applications where moisture is a factor. Mounting options include rigid or swivel top plate, with or without top lock or total lock brakes and bolt on swivel locks. All rolling on finely crafted double ball bearing heat treated raceways that keeps you moving forward.