Precision 10/18 Male Quartz Joint

These joints are sold by the end. Precision Ground Joints! A step up from China imported joints, but still affordable with quality you can trust. 10/18 male socket joint, 5.5" in length. 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 10/18 would be a Top Outer Diameter of 10mm and a grind length of 18mm.)