The stand-up 15-lb dual bottle rack positions your nitrous bottles vertical to the floor. This rack is designed to hold two 15-lb industry-standard, 6.90-inch-diameter bottles. Built from a combination of aluminum and steel to reduce weight and increase strength. Our all new style, billet aluminum quick-release-bottle clamp assembly makes changing the nitrous bottle fast and easy. Simply loosen the locking knobs (no need to completely remove the knobs like on competitors' models) and swing the clamp open. Each rack features a rubber guard on all edges that contact the bottle to prevent scratching. The rack bolts easily to the floor in the driver compartment or chassis crossmembers.