New 20-piece set of 5/8 x 5/8 plastic tubing end caps designed as square hole plug inserts for square tubing or similar openings. These caps can be a practical option for covering exposed tube ends, helping finish a project more neatly and making replacements easier when worn or missing. Free Shipping is included, which may be useful if you need a small hardware pack without added delivery cost. Buyers looking for matching size should pay close attention to the 5/8 x 5/8 measurement to confirm fit before ordering. Material is listed as plastic, but other product specifics are not provided here. Check the listing for full details. 5/8" X5/8" Plastic Tubing End Caps, 20Pcs Square Hole Plug Insert for Square Iro. Color: Black, Condition: New. Listed at 9.74 USD. They can also protect sliders on furniture chair legs, table legs, bookshelves, and patio furniture. Fixture Type Removable. Square Hole Plug is waterproof, strong, and abrasion-resistant, suitable for preventing wear and tear on wooden floors and reducing noise.They can also protect sliders on furniture chair legs, table legs, bookshelves, and patio furniture. Fixture Type Removable. Square Hole Plug is waterproof, strong, and abrasion-resistant, suitable for preventing wear and tear on wooden floors and reducing noise.