Measure: The legs of the bed frame have three different height sizes, and the height of the legs can be adjusted 150mm ( Adjusts from 165mm to 285mm), 180mm ( Adjusts from 195mm to 345mm), 198mm ( Adjusts from 210mm to 375mm Function: The leg is suitable for most of the bed frames, bed center, which can protect your bed and mattress from damage or sagging : The bed frame has hole, aim at the double hole with the legs for bed frame and tighten the screw the bed frame without hole, clamp the bed frame with bed frame legs and auxiliary plate and tighten the screws More stable: The diameter of the adjusting screw at the bottom of our bed leg is 45mm, so it is more stable Packing included： 1pc bed frame center leg, Manufacturer: JAZUAIAO