Durable and long-lasting withstands years of rough use. All heavy duty 6063-T5 alloy aluminum type construction. Fully-welded frame features 1 1/2″ x 1 3/4″ D”-shaped tubing. Crossbracing consists of 1″ square tubing. 1 1/2″ square tube base features heavy duty 6″ x 2″ non-marking swivel plate casters. 2″ wide aluminum angle slides are welded to frame. These racks accommodate 18″ x 26″ sheet pans. Three welds per angle connection.