Female 14.5mm to Female 18.8mm Adapter - Gravity Hill Glass
This optional glass waterpipe adapter from Gravity Hill Glass from Gravity Hill Glass is made from top quality Schott-Duran borosilicate glass.
The piece features female connections at each end - one at 14.5mm and one at 18.8mm, allowing you to customise your glass waterpipe to accommodate 14.5mm or 18.8mm bowl slides, oil nails and vapor domes.
Gravity Hill Glass are a new American glass company based in California.
Using premium quality materials and advanced lampworking techniques, this small manufacturer produces superb quality bongs and glass smoking rigs with scientific features and achingly beautiful designs