RB Rubber Black Beveled Rubber Flooring Edge Reducer - 12' Transition Strip for use with 3/8" Thick Rubber Flooring Strip Length: 12 Feet Strip Width: 2 inches at bottom / 2.5 inches at top (including lip). Strip Weight: 6 lbs. Color: Black. Material: Rubber For use over rubber flooring rolls and interlocking tiles 5/16" (8mm) to 3/8" (9.5mm) thick. Designed to reduce flooring thickness to level of adjoining floor or sub-surface.