The ground joints are unions made out of glass that unites different glass articles with the objective of not having liquid leaks and the pieces to be firm one on each other.
There are two types of ground joints, the female and male ones. Their shape is conical with a 1:10 proportion.
When we refer to a female ground joint, for example the 29/32 joint, this terminology refers to a female joint with 29 mm wider diameter and a high of 32 mm.
The joint has a conical shape and its narrower diameter has 90% of the wider one, so the taper is 10 %.
Vilabo produces all the common standard European ground joints such as: 10/19, 14/23, 19/26, 24/29, 29/32 e 45/40.