Adjustable from 4.7 inches to 8.67 inches (12 cm to 22 cm). The bed frame center support legs are designed to accommodate different bed heights to help prevent damage or sagging. The bed frame support legs are made of metal, which is corrosion-resistant and will not rust or deform. High load capacity with individual leg support up to 250 lbs. The bottom of the legs features PVC pads that are non-slip and help protect flooring from damage. Easy to install with T-shaped feet; no drilling required. When the bed frame has holes, use the mounting plate to align the double holes, insert the screws, adjust the distance, and tighten. If the bed frame has no holes, attach the legs using the auxiliary boards and secure with screws. Color: Black Material: Metal Package Contents: 2 x Adjustable bed legs 4 x Screw rods 4 x Nuts 2 x Mounting plates Only the above package content is included; other items are not included. Note: Lighting reflections and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 13 cm.