HOW TO FIT: Fits 2-1/2" (2.5) Od Round Tubing With Inside Hole Diameters (Id) From 2 1/4" To 2 7/16" And Wall Thickness Of .040" - .122" (10-20) Gauge FLOORING PROTECTION: High-grade Prescott Plastics black ribbed plugs work great for preventing scuffs on wood floor or as protection glides on chair tips, bench feet, table legs, bar stool foot sliders, chair leg protectors, patio furniture inserts, and much more. They are also designed to hold up against impact abuse, and harsh weather conditions. EASY TO INSTALL: Our easy to install 2 1/2" snap in plugs serve as a long-lasting solution for many household or outdoor projects including replacements for fence/fencing railing posts, gate rail post covers, trailer frame ends, pole pipe rod caps, metal bike rack fittings, wrought iron steel finishing plugs, or any circular opening. 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 Plugs are specially designed and produced in UK to maintain quality, endurance and durability. 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.