SBD (Pack of 04) 2.50 Inch / 2-1/2” - 16-23 Ga - Genuine CAPLUGS Make Square Plastic Plugs | Tubing End Cap, Furniture Glide Inserts | Fencing Post End Caps. Features a series of tapered ribs which ensures a secure fit perfect for use on a wide range of metal furniture, appliances and similar items. The exterior ribs are designed to provide a sure grip inside a tube Durable construction and excellent gliding edges. Not subject to rust or corrosion. Material: Low-Density Polyethylene. These plugs are sized for Convenient pack of 10 plugs for small projects Suitable for both light and heavy-duty applications Select the size that matches the tubing outside Cap measurement. Select the Gauge to suite the Inside Grip Range. Positively Angled locking rib design allows these plugs to fit most inside diameters