Precision Ground Joints are a huge step up from China imported joints but still affordable with quality you can trust. The Precision 45MC is a single ended 45/50 joint, male, and 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 45/50 would be a Top Outer Diameter of 45mm and a grind length of 50mm.) The Precision line of joints is made with Schott glass.
