GRAV 19mm Female to Female Joint Adapter | Glass Joint Converter

The GRAV 19mm Female to Female Joint Adapter is a borosilicate glass connector that lets you join two 19mm female joints together, expanding compatibility between bongs, downstems, and accessories that would otherwise not fit.

Best for: connecting two incompatible 19mm female joints

Key Features

119mm to 19mm conversion connects two female joints for expanded compatibility

2Clear borosilicate glass construction from GRAV

3Low-profile design that doesn't add bulk to your setup

Product Specifications

Why Choose This Adapter

Joint-size mismatches don't have to mean buying a whole new piece — this adapter solves that gap directly. GRAV is a well-known name in scientific glass, so it's built to hold up to repeated use rather than being a one-time fix.

Ideal For

Owners mixing pieces from different brands with incompatible joint genders, anyone building a custom rig setup from separate parts, or looking for a budget-friendly fix instead of replacing a whole piece.

Care & Maintenance

Wipe with isopropyl alcohol on a cotton swab to remove residue, then rinse with warm water and let it air dry fully before reassembling.

Frequently Asked Questions

What does a female-to-female joint adapter do?
It connects two female joints by providing a middle piece with a male end on each side, letting incompatible pieces join together.

Will this fit any 19mm joint?
It fits standard 19mm female glass joints. Confirm your piece's joint size before ordering since 14mm and 19mm are not interchangeable.

How do you clean a glass joint adapter?
Wipe with isopropyl alcohol on a cotton swab, then rinse with warm water and let it air dry fully.

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