Each screen diameter is about. 3 / 4 inch (0.75 in), universal shape fits most pipes or bowls of any size.Pipe screens are very flexible and easy to clean, so you can reuse them. The effect after cleaning is still very good.STEP 1: Put the screens into the bowl opening. STEP 2: Press down firmly with a stick or some pipe tool. STEP 3: Make sure the screen is secured in place.