Rev-A-Shelf's 4WCTM Series designed with durability in mind is available in a multitude of sizes. The 4WCTM Series features a natural maple frame that glides on full-extension with 1-1/2" over-travel, ball-bearing, 150 lb. rated slides. Single 35 and 50 qt., double 27, 35 and 50 qt. face frame units have adjustable rear mount brackets.