TAG - Closed End 28/18MM Double UFO Downstem

TAG – 28/18MM Super Slit Double UFO Downstem

Dual Diffusion. Smooth Pull. Advanced Function.

The TAG 28/18MM Super Slit Double UFO Downstem is built for performance and airflow.
Featuring two stacked UFO-style diffusers, each lined with multiple super slit openings, this system provides heavy, even diffusion without restricting draw speed. The 28MM male outer joint fits large-joint beakers and straight tubes, while the 18MM female inner joint maintains compatibility with standard 18MM male slides.

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Key Features

• 🛸 Dual UFO Diffusion Chambers – Two stacked UFO percs deliver layered bubble action for smoother, cooler draws.

• 💨 Super Slit Design – Each diffuser features high-density slits for maximum surface agitation and balanced resistance.

• ⚙️ 28/18MM Joint Configuration – Large outer joint (28MM male) connects to 28MM beakers; inner joint (18MM female) accepts 18MM slides or accessories.

• 🧱 Thick Borosilicate Construction – Durable, precision-ground joints ensure a snug, airtight seal.

• 🧼 Open Flow Design – Clears easily with minimal splash and smooth drag reduction.

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Downstem Measurement Note

Downstem length is measured by insert length (from the end of the frosted joint to the tip).
Always confirm your existing fitment before purchase.
👉 TAG Downstem Sizing & Measurement Guide

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Why You’ll Love It

This downstem is designed for maximum diffusion and airflow balance, combining the elegance of the UFO form with the high-density function of TAG’s Super Slit system. It creates a powerful chug that stays smooth and consistent, perfect for those upgrading from a single-diffuser stem.

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Made To Order (MTO)

Need a specific joint, length, or variant? TAG’s Made To Order program can produce nearly any configuration.
👉 Learn More – Made To Order (MTO)

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Optional 2-Year Warranty

Add protection for peace of mind — if it breaks, TAG replaces it once (just pay shipping).
👉 Warranty Protection Plan