Application : The height of this bed frame support legs can be adjusted with the swivel base to select the right height to suit uneven floors.The shortest is 8.3 inches, the longest can be adjusted to 14.5 inches.We also offer another size: (adjustable height 8.3 inches to 14.5 inches) New Upgrade : A. Our support base adopts a widened design, with the base 30% wider and more stable than other brands. B. Our bolt for adjusting the height of our support legs adopts a full leg thread design, which is more than 3.5 times thicker than other brands' threads and has stronger load-bearing capacity. Material : The bed frame support legs is Made of Tough Rigid Plastic, and the surface is treated. More Application : This adjustable support legs is not only suitable for bed, but also suitable for cabinet, ,table,couch, ottoman, chair, TV stand, night stand, love seats, sofa, desk, footlocker, wardrobe, coffee table,bathroom cabinet, dresser, shelves, bookcases or other home furniture.