Universal 5 1/4" Adjustable Height Bed Frame Riser Threaded Glide Legs Set of 6 Comes with6 Standard Size Plastic Socket Insert and Nut. Make Moving or Shifting a bed Effortless on Wooden, Stone or Concrete Floors. Made of High Density Polyurethane and Steel. Good for Wooden Floors. Remain Stationary on most Carpets. Measurements: Overall Height: 6" Stem Length: 5-1/4" Rise: Up to 4-1/2" Base Diameter: 2 1/4" Socket Insert Width: 1/2" Stem Type: 3/8"-16 Thread Stem Maximum Rise depends on the quality of your existing bed frame. FAST SHIPPING BY USPS PRIORITY MAIL