An adapter is a glass piece that changes the joint size or angle on a bong. It lets different bowls, nails, or attachments fit together. Adapters add versatility by connecting parts that normally wouldn’t match, like switching a 14mm joint to 18mm or converting male to female fittings.
GRAV® reduction adapters shrink a 19mm joint to 14mm for smaller accessories—upgrade your setup with the right fit.