2-Piece Steel Stem Plastic Bed Frame Glide Legs, Set of 9 Glides are recommended for wood, tile, and other hard surface floors. 3/8" Diameter Stem, 2 1/2" Wide at Base, Height is 4" Designed to replace bed frame wheels - Pop out your casters, pop these in. These are a very common leg on bed frames, and can be used to replace lost or damaged ones. Packaged as a set of 9 complete legs (9 tops, 9 bottoms), and includes a set of nine 1/2" plastic insert plugs as well.