Adjustable height: Using the stackable adjuster, you can raise the object to 9 inches (approximately 22.9 cm) safely and without risk, and you can easily adjust the height according to your needs.Movement becomes simple: use the furniture lifter to gently lift the furniture you need; then put the roller slider below to easily slide the furniture and appliances to the floor 4 heavy-duty moving rollers: each slider has 12 heavy-duty wheels, which can support up to 160 pounds (4 sliders are suitable for 600 pounds); the rollers can directly advance in two directions. The set has 4 anti-slip mats, if you put them on it, you can increase friction and prevent the furniture from slipping off during the movement.The perfect furniture slider kit: With the furniture lifter and roller slider kit, you can move the furniture yourself, rearrange the furniture, remove or take them off, so you can better clean it.Suitable for most furniture and equipment: Furniture wheels are suitable for all kinds of heavy furniture and electrical appliances around the house. Can be used for your sofa, cabinet, refrigerator, washing machine, bookcase, piano table, etc. But we do not recommend moving heavy furniture on the carpet (the effect may vary depending on the type of carpet).Material:Iron + plasticcolour:BluePackage Contents:1 x furniture lifter1 x elevator lock bracket4 x furniture movers can support up to 600 pounds4 x extensions (each 3.81 cm high)4 x short extensions (each 0.32 inches high)Only the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.