Check the listing for details. 11/16" (18mm) Square Tubing End Caps, 50 Pcs Hole Plug Insert for Tubing, Black. Color: Black, Condition: New. Listed at 11.78 USD. DescriptionFlooring Protection: The tubing plugs' end caps are made from durable PP material, durable and wear-resistant, preventing wear and tear on wooden floors and reducing noiseEasy to Use: Simply slide each end cap onto the square tubing until it sits flush with the end, easily insert it into your tube end with a simple thumb push or a gentle tap with a rubber mallet or hammer, the caps are designed to fit snugly, providing a secure and tight fit that will not easily come off during normal useRibs Design: Square tubing end caps with ribbed designs for a secure grip inside the tube or furniture legs to impact and abrasion resistanceWide Application: Plastic tubing end caps are suitable for stainless steel tubing, aluminum tubing, metal tubing, and other tubing post.