SQUARE POST SHELVING STARTER & ADD-ON UNITS CASTERS FOR SQUARE POST WIRE SHELVING Product No.   HSP5S Description   5" Swivel Size W x L x H   2-1/8 x 5-3/8 x 8-1/8" Wt. (lbs.)   3 Price Ea.   $28.29 $26.88 Quantity: