Oase Shutoff Valve External 12/16mm 16/22mm Hose Tap Piece Joiner Aquarium tank
Can be used with OASE FiltoSmart 200-300 and BioMaster 250-850 filters, and OASE ClearTronic 7w UVC. OASE ShutOff Valves for External Aquarium Filters makes routine filter and tubing maintenance quick and easy.