Floor mounted adjustable height roller assembly in slim single roller design with front adjustment location. This roller is 4-3/8" long by 5-3/8" wide. Height adjustment min/max 1.06”-1.93”. American made and assembled in Elkhart, IN. Engineered to self-lubricate during the life of product for smooth, squeak-free performance. 200# dynamic load rated. *Not Engineered to lift (jack) slide-out room.