3" Square Tubing Heavy Duty Plastic Plug End Cap Insert 3X3 8-14 Tube Pipe, 4 High quality heavy duty thick wall plastic finishing plug, end cap for 3" steel square tubing. Fits inside tube diameters from 2.65'' to 2.82'' (2 11/16'' to 2 13/16'') Compatible Outside Tube Diameter: 3'' x 3'' Compatible Tubing Wall Thickness: .085-.165'' (8-15 gauge) Made in USA with Heavy Duty Thick High Grade Plastic Thick heavy wall plastic plugs for square tubing are manufactured to provide a secure fit on multiple tube gauges. These tube plugs are perfect for fence post caps, office/patio furniture, chair glides, wrought iron, appliances, exercise equipment, or anywhere a clean finished look is desired. Built with multiple ribs for easy install and secure fit. Holds up well to impact abuse and environmental exposure. If you need more than 1 please change the quantity to the number desired. The more you buy the less each plug will cost. Color: Black Compatible Outside Tube Diameter: 3.000 in Compatible Inside Tube Diameter: 2.65" - 2.82" Compatible Thickness Range: 08-15 gauge Compatible Wall Thickness:.083-.164 in Material: LDPE Finish: Textured