Adjust your height from 2.25" to 24" with our versatile Uni-Coupler™ System. Our Uni-Cap™ is self-leveling and adjustable in any direction from 0% to 4% slope. Multiple Uni-Couplers™ may be used for incremental height build up, and our Uni-Base™is exceptionally designed at a 3/16" (5mm) thick and has a solid surface of 7" in diameter in order to prevent any type of flexing and subsequent damage to the waterproofing membrane.