(CMTO) TAG - 18" Straight Tube Bong 50x9MM - 28/18MM Downstem (4.50")
This 18 inch straight tube is built heavy. The tube is made from 50MM diameter borosilicate with 9MM walls, genuinely thick glass that resists thermal shock and shrugs off the everyday knocks a tall straight tube invites. The clean vertical column keeps airflow direct and fast, and the removable downstem does the filtration work: it drops the draw below the waterline and diffuses it into bubbles for cooling on the way up.
The joint is 28MM female, an oversized connection that seats a wide, stable downstem and a high-airflow slide. It ships with a 28/18MM downstem measuring 4.50 inches, which means a 28MM male end into the tube and an 18MM female end that accepts an 18MM male slide. The included matching glass slide fits that 18MM connection. The downstem is removable, and its length can vary slightly, so measure before ordering a replacement. The sandblasted TAG logo is etched into the glass, so it will not fade with cleaning.
This is a made-to-order (CMTO) build, so it is produced after you order rather than shipped from stock. Heavy-wall borosilicate is durable but not unbreakable, so avoid thermal shock and let the glass reach room temperature between temperatures. What's in the box: the water pipe, the 28/18MM downstem, and the matching 18MM slide. Accessories may be taped inside the bubble wrap, so check the wrapping before reporting a missing item.
- Type: Straight tube water pipe (removable downstem)
- Joint size: 28MM female, accepts the included 28/18MM downstem
- Downstem: 28/18MM, 4.50", accepts an 18MM male slide
- Glass thickness: 50MM diameter tube with 9MM walls
- Height: 16" to 21" (slight variance)
- Finish: Sandblasted logo (permanent)
- Included: Matching glass slide
- Build: CMTO, made to order
Downstem Fitment Note
Insert lengths can vary slightly between units (±¼–½"). When purchasing replacements, always measure your insert length first.
See the 👉 Downstem Sizing & Measurement Guide.
Made To Order (MTO)
Want a specific color, label, or joint style? TAG offers a long-standing Made To Order program for custom configurations and restock requests.
Learn more at 👉 Made To Order (MTO) or email info@thickassglass.com with your request.
Free 2-Year Limited Warranty
Qualifying 1st Quality TAG glass purchased from thickassglass.com or shop.thickassglass.com on or after October 15, 2026 includes a Free 2-Year Limited Warranty. One eligible replacement within two years after delivery is 65% off MSRP (you pay 35% of MSRP), plus shipping & handling. Quartz, lower-grade items and other brands are excluded. Full warranty terms and earlier paid-plan coverage.
