Valve, Chem-Vac, Glass Portion Only, Low Hold Up, 0-4mm Bore, 13mm OD Barrel, 9mm X 1.5W Sidearm. CHEM-VAC valve glass portion only. Valve has two sidearms sealed to the barrel at a 180¿ angle to one another and bent to minimize hold up of fluids. Heavy duty rounded coarse thread and precision formed tapered seat. Dimensions as listed.