These high quality plastic finishing plugs fit tube outside diameters 3", Wall Thickness .039" - .079" square steel tubing The pipe plugs are suitable for pipes with a wall thickness of 2-4., 5 mm Use of plugs for steel pipes, aluminium pipes, chairs, tables and other furniture, pipe covers, UV-resistant; installation: for hammering or inserting Safety Warning Attention: Please carefully insert or insert the lamellar plugs into the pipes. Plastic Plug Covers 4 Lamellar Plugs Grey For Square Pipes, 75 X 75 Mm, Pipe Furniture Gliders Pipe End Caps About this item [Outside Dimension Size]: 75 x 75 mm / 3 x 3. If the outside dimension of your square chair legs are 75 x 75 mm / 3 x 3, then these plastic pipe plugs chair leg caps will fit. (The pipe plugs are suitable for pipes with a wall thickness of 1-3 mm / 0.04-0.12. [Prevent Scratches & Reduce Noise]: Putting these plastic plugs / chair feet covers on the chair feet... Made of plastic (polyethylene), high quality, made in Germany Product description Whether as a glider for steel pipes, aluminium pipes, chairs, tables and other furniture, as end plugs for pipe constructions or as decorative plugs - our lamellar plugs are versatile. SBS Lamellar Plugs For Square Tubes, 20 x 20 mm to 50 x 50 mm, Plastic Allows the furniture to glide smoothly and also protects the floor, from scratches and other damage