Floor mounted adjustable height roller assembly with front or rear height adjustment locations. This roller is 6-10/16" long by 3-3/4" wide. Height adjust min/max 1.21”-2.32” 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.