Features: Ribbed for easy installation and secure fit Great for covering sharp edges of the tube Ideal to keep the ends secure when built For holding water and stopping rusting from the inside The advantages of using plastic tube liners include: Offers a neat and secure finish to the tube ends Tube inserts can prevent dirt and dust from entering Press the application for a tight fit. Material: These black ends are made of heavy-duty plastic and built into multiple ribs for easy installation and secure attachment Diameter: 16mm,19mm, 20mm ,22mm, 25mm, 28mm, 30mm, 32mm, 35mm Multiple outer diameters: 1/2 inch es, 3/4 inch, 1 inch, 1-1/4 inch, 1-1/2 inch, 2 inch es; Multiple sizes allow for wider use Quantity: 10 pieces of each size, enough to meet different requirements in daily life Kindly reminder: The size choices of these plastic plugs are determined by the outer diameter of something you want to insert Package Included: 10 x Round Plastic Plug Terminals