Pro Series Pipe Clothing Rack Caster. Make the most of your Pro Series Pipe Clothing Racks using this locking caster. With casters, your pipe clothing racks will be easy to move. This caster features a lock to secure pipe clothing racks in desired positions. Note: This caster is sold EACH, not in a set. Purchase the quantity of casters desired (not sets desired). This product is a part of our line of Pro Series Pipe Clothing Racks.