Valve, Chem-Vac, Glass Portion Only, 90¿, 0-12mm Bore, 22mm OD Barrel, 16mm X 1.8W Sidearm. CHEM-VAC valve glass portion only. Valve has two sidearms sealed to the barrel at a 90¿ angle to one another. Heavy duty rounded coarse thread and precision formed tapered seat. Dimensions as listed. PLEASE NOTE: THE 0-20mm BORE SIZE IS OUR PREVIOUS STYLE CG-500 SERIES VALVE WITH COARSE THREAD.