Valve, Chem-Vac, Glass Portion Only, Low Hold Up, 0-8mm Bore, 19mm OD Barrel, 12.7mm X 1.6W 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.