High quality vases made for the modern Russian type shisha's such as matt pear, union, alpha and many more.
The glass unlike some of the more fragile ones is gaining popularity for being more budget end of the spectrum and to provide your shisha essentially with some new wheels! in the UK such bases are hard to come by unless you are importing from abroad.
These are the 'drop' shape bases you typically see on alpha hookahs
Height : about 25.5 cm
Inside diameter of the neck : approx. 4.6 cm
Neck diameter outside: approx. 5.9 cm
