Folding Table risers for Folding Tables Straight/Bent Leg, Dural Folding Table Leg Extensions 4 Levels/Heights Table Leg Extenders-All for Treating Your Back Pain(4-Pack)MaterialMetalShapeRoundAbout this itemIf you have a sore back from hunching over a table with traditional fold out legs while working. We believed that folding table risers with 4 levels and heights were the best option. Then you got lucky and discovered this table leg height extension. These table leg risers are made with super durable steel, Electrophoresis black material which doesnt bend, rust or oxidize in indoor and outdoor! Save Your Greenback.