4" Steel Adjustable Bed Riser Legs, Set of 4 by Leggett & Platt. $60.95. 4' steel adjustable bed riser. Fit most Leggett and Platt adjustable beds. The new 4" legs will allow you to change the height of your adjustable bed according to your needs. These 4" Riser legs will provide great support for your bed, and will fit most Leggett and Platt adjustable Beds. Set of 4.