HOW TO FIT: Fits 1.5 x 3 (1-1/2x3 inch) OD rectangle tubing (confirm you are measuring the outside, not the hole). EASY TO INSTALL: Our 1.5 x 3 (1-1/2x3 inch) snap in plug is a long-lasting solution for many household or outdoor projects including: Fence/Fence Railing Posts, Gate Rail Post Covers, Trailer Frame End Posts, Pole Pipe Rod Caps, Metal Bike Fittings, and Wrought Iron Steel Finishing Plugs. FLOORING PROTECTION: Prescott Plastics black ribbed plugs prevent scuffs on wood and other natural floors. They provide a protective “glide” for chair tips, bench feet, table legs, bar stools, patio furniture, and other furniture designed for furniture inserts and plugs. PREMIUM QUALITY PLUGS: Our plugs and inserts are designed to hold up in all harsh weather conditions and high traffic areas. MADE IN UK: These Plastic Plugs are specially designed and produced in UK to maintain quality, endurance and durability. Prescott Plastics 1.5 x 3 Inch Rectangle Plastic Plug Insert (50 Pack)