14/20 Female GG Joint

When ordering ground glass joints you must consider measurements (X/Y=) Where X is the Top Outer Diameter, and Y is the Length of the Grind. (So 14/20 would be a Top Outer Diameter of 14mm and a grind length of 20mm) This item is sold by the end, so EA and 100pc both mean the number of joints you get, however this item is double ended.