The LDR12292G is an adapter used to go from an LD122I to an LD92I or vice versa. Fortress lineset cover series was specifically developed to bridge the gap between the lightweight and the more costly lineset cover products available on the market. Made in the USA, Fortress has a number of of innovations to suit the USA conditions - such as 8' lengths of duct and a 12 month guarantee. Available in 2 sizes and 4 different colors Fortress offers the strength and longevity at a moderate price point.