Stack-It adjustable risers add 2.5 CM, 5 CM or 7.5 CM height to furniture - great for adding height to desks, beds, tables, couches, sofas, dressers, and other heavy stationary furniture or objects Each riser has a removable rubber gripper on bottom that protects floors from damage and stops furniture from sliding - safe on all floor surfaces To add height to furniture, simply stack these interlocking risers on top of each other. Each stack-it riser adds 2.5 CM height - max stack height is 7.5 CM (3 stack-its) Recessed holder top with universal fit contours designed to securely hold in all furniture legs 1 to 3.5 inches wide, furniture panels / bases 0.5 to 1.5 inches wide, and bed casters / wheels Includes 8 black 2.4 CM tall x 10 CM round heavy duty bed risers with high weight capacity - Each individual stack-it riser will support up to 453 KG, Weight: 0.1 Pounds, Manufacturer: Slipstick