Tubing Insert End Cap can be used as non-slip protection for furniture such as bench legs, chair legs, table legs, bar stools, and pool fences. It can also be used as luggage rack end inserts, fitness equipment end inserts, and other square tube end caps.SpecificationColor: BlackMaterial: PlasticTotal Size: 20x40x16.4 mm/0.79x1.57x0.65 InchApplicable Range of Tube Single Side Wall Thickness: 0.5-3 mm/0.05-0.12 InchPackage List: 25 Pcs x Plastic Hole PlugsAdvantageWaterproof, abrasion-resistant, and UV-resistant, plastic end caps are held in place by ribs and reduce noise, prevent scratches to floors and finish tube ends to prevent rusting.InstructionYou choose the right size of Insert End Cap, insert them into the pre-prepared holes, and make sure they are securely fastened to keep the surface neat and attractive.NOTE: This product is marked with the outer diameter size, please purchase according to the outer diameter size you need to purchase! For example, if the outer diameter size of your square tube is 30*30mm, please purchase a 30*30mm pipe plug!