Glass GoG 18.8 mm to 14.5 mm Downstem Adapter

Refresh a favorite bong or convert it to a different bowl size in seconds. This glass-on-glass downstem adapter reduces a standard 18.8 mm joint to a 14.5 mm connection, giving you broad compatibility with common herb slides and accessories.

Key Features & Specs

• Material: glass (glass-on-glass connection)
• Joint spec: fits 18.8 mm female bong joints; accepts 14.5 mm male bowls/slides
• Style: straight downstem adapter (bowl not included)
• Best for: dry herb setups
• Quantity: sold individually
• Options: length/variants may be shown on this page—choose what’s available at checkout

Why You’ll Love It
A simple swap saves a full setup. Whether you broke a stem or want to run a different bowl size, this adapter restores a tight, air-sealed fit and smooth pull so your piece hits like new.

Care & Usage Tips

• Measure from the bottom of the ground joint to the end of the frosted section to match your length.
• Rinse after sessions; for deep cleaning, use a glass-safe solution like Formula 420, then rinse and air-dry.
• Twist gently when removing to protect the joint and grommet areas.

Intended for legal use by adults 21+. Keep out of reach of children.

Keep your favorite bong in rotation—add this 18.8 mm to 14.5 mm downstem adapter to your cart today.

*Per industry standard, length is measured from the bottom of the frosted joint to the tip of the downstem — not the overall end-to-end length of the piece. See our Downstem Measuring Guide for details.*