Our weld-in 10-lb dual bottle rack comes with two sets of brackets and can be mounted in either the lay-down or 15 degree from horizontal position. This rack is designed to hold two 10-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.