You light your pipe to relax and unwind, so the last thing that you want is to end up being frustrated when you puff. Unfortunately, clogs can form in the stem of a pipe, leading to frustrations aplenty when you're trying to enjoy your pipe. By putting one of these Stainless Steel Pipe Bowl Screens into your pipe, you'll block the large particles from entering the stem, so that every drag is perfect. Crafted out of corrosion resistant stainless steel, the pipe bowl screens come in a pack of five with 20 packs in this order. You can select a 10-millimeter, 15-millimeter or 20-millimeter size to suit your pipe.