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Grav Labs 14.5mm Male to 18.8mm Female Expansion Glass Adapter

Rated 4.5 out of 5 stars (21 reviews)

$ 10.99 Free Shipping In Stock

About this Product

Product SKU: A69

GRAV offers its line of expansion adapters to help people like you increase the diameter of their favorite water pipe joints to make their rigs compatible with larger accessories.  This GRAV 14mm male to 18mm female expansion adapter converts a 14mm female joint into a larger 19mm male. 

This adapter is made of 14.5mm thick borosilicate glass that's durable.  It's a great accessory to have on hand when you want to try out a new combination with your favorite water pipe.  It fits snugly in your piece and is designed to give you some flexibility and creativity when you want to try something new!

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Great purchase
"I couldnt be more happier with this adapter. It works perfectly, looks amazing, and arrived super fast."

- Travis G. Verified Buyer

All products on this site are intended for tobacco or legal dry herb usage.


  • 14.5mm
  • 18.8mm
  • Adapter
  • Borosilicate Glass
  • Clear Glass
  • Female Joint
  • For Female Joints
  • For male joints
  • Glass Accessories
  • Ground Joint
  • Male Joint
  • Mothership Disconnected
  • Scientific Glass
  • Thick Glass

Included in Your Purchase

  • Grav Labs 14.5mm Male to 18.8mm Female Expansion Glass Adapter
  • Free, Fast Shipping (in the US)
  • Discrete Packaging
  • 100% Satisfaction Guarantee
  • Expert Product Support