HOW TO FIT: Rubber End Caps.This cap only fits 1 1/2" - 1.5" round tube or pipe ( 1 1/2" Outside Dimension) & can stretch up to 1/16” larger for a snug fit without tearing or splitting. 1" deep / tall to provide a secure fit. EASY TO INSTALL: These rubber pipe caps are easy to install 1 ½" push-on caps serve as a long-lasting solution for many household, outdoor, & marine boat dock projects including replacements for fencing railing posts, steel gate rail stopper, rod / rebar or wrought iron caps, thread bolt screw or nut safety, hub cap sheath, or finishing any round tubing project. 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 USA: These Plastic Plugs are specially designed and produced in USA to maintain quality, endurance and durability.