Check the listing for details. 4" Inch 18mm/14mm Downstem Glass Slide Full Blue MATRIX Perc Diffuser. Condition: New. Listed at 16.79 USD. Normal 0 false false false EN-US X-NONE X-NONE Make sure it's the correct length and that a 14mm bowl will fit your downstem. 14mm is the THINNER of the two bowl sizes. 4" length only accounts for the downstem and does NOT include the joint. Full length including the joint is 5" (which is not the length you want to use). Fits the standard bong stem (18mm) Stem Size 18mm Length 4 Inches Joint Width 1 Inch Tip Width 3/4 Inches Bowl Required 14mm Material Glass Shipping We offer FREE 2-5 business day shipping on all US orders! We also offer international shipping for those outside the US. Orders sent within 1 business day (Monday-Friday). (Alaska, Hawaii, and countries outside the US should expect longer shipping times). Discreet Packaging The label and packaging will be discrete and undefinable for privacy. Returns If your item is lost or damaged during transit, then WE are responsible and will issue, at your preference, either a full refund or replacement. Check out our other listed items to find the right water pipe & water pipe accessories for you! https://www.ebay.com/str/thealchemistscrucible