TAG - 18/18MM Open End Bong Downstem 32 Slit Multiplying Rod

TAG – 18/18MM Multiplying Rod Downstem (Open End)

High Airflow. Wide Diffusion. Classic TAG Performance.

This TAG Multiplying Rod Downstem delivers balanced airflow and diffusion in a durable, scientific design. Featuring 8 precision-cut slits, each reinforced by 3 multiplying rods, it divides airflow into 32 total openings for smoother bubble stacking and consistent performance.

Unlike finer-cut diffusion stems, this model uses wider slit cuts that create a touch of classic beaker chug — offering that satisfying draw resistance many prefer. The open-end format ensures a full, unrestricted clear and helps debris exit freely to reduce clogging.

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Key Features

• 🔬 8-Slit Grid Layout (32 Total Openings) – Each slit reinforced by multiplying rods to split airflow for full, even diffusion.

• 💨 Wider Slit Cuts – Delivers stronger airflow with a natural beaker-style chug while maintaining smooth diffusion.

• ⚙️ 18/18MM Joint Fit – Designed for 18MM female joints and compatible with 18MM male slides.

• 🧱 Handcrafted Borosilicate Construction – Durable, heat-resistant, and built for everyday use.

• ✴️ Laser Engraved Logo – Permanent, solvent-safe engraving with a clean, professional finish.

• 💎 Scientific Aesthetic – A refined, functional look that complements any premium glass setup.

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Downstem Measurement Note

Each TAG downstem is handmade and measured by insert length (the portion that sits inside your piece).
Small variances are normal due to handcrafted production. Always confirm your beaker’s fitment before ordering.
👉 Downstem Sizing & Measurement Guide

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Why You’ll Love It

The 18/18MM Multiplying Rod Downstem brings strength, airflow, and classic diffusion feel together. Its wider slits give you a more responsive, traditional draw while still keeping bubbles dense and consistent. Combined with the open-end design for quick clears, it’s a TAG staple built for performance.

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Made To Order (MTO)

Need a specific joint type or custom variant?
TAG’s Made To Order program allows you to request nearly any configuration.
👉 Made To Order (MTO)

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Optional 2-Year Warranty

Add peace of mind with TAG’s 2-Year Warranty Plan — if it breaks, we replace it once (just pay shipping).
👉 Warranty Protection Plan