2.75" tall risers raises furniture & bed height 2 inches - These furniture risers add 2 inches height to beds, couches, tables, desks, armchairs, sofas and other heavy stationary furniture and increases furniture ergonomics by boosting the sit to stand process (to add 7" height stack on top of Slipstick CB671 5" risers - sold separately). Note furniture riser height is 2-3/4" while the raise height it provides is 2" due to recessed holder cup on top. Locks in wheels and furniture feet – 0.75 Inch deep recessed holder cup with memory foam cushion pad built into top of riser securely locks in caster wheels, rollers, bed posts and furniture legs up to 3 inches round or up to 2.1 inches square. Note furniture legs must fit inside round recessed holder top cup of furniture riser. Heavy weight capacity & floor safe - This set of 4 bed risers supports 2,640 pounds (660 pounds per riser cup) and each furniture riser cup features 3 small rubber grips on base to stop furniture from unwanted sliding and protect floor. Each bed riser is 2.75" tall x 5-1/8" round at base and has a recessed 3" round furniture leg / wheel holder top cup. Creates storage space under furniture - Lifts up beds / furniture 2 inches creating extra storage room underneath and makes cleaning under furniture easier (great for robot vacuums). Perfect risers for dorm rooms, bed rooms, offices, living rooms and more. Note risers will not fit furniture legs larger than 3" round or larger than 2.1" square at foot. Heavy duty puncture proof design - Each furniture riser features a steel reinforced plate under the furniture leg holder cup that prevents bed posts, bed rollers, or furniture legs from puncturing through making them ideal risers for lifting heavy furniture. Steel plate and foam pads are strongly bonded to the riser body for stability.