Description:<br /><br /> Aquarium Fish Tank Throttle Water Flow Control Switch 12\/16mm 16\/22mm<br /><br /> Can control the water flow effectively<br /><br /> High quality plastic｣ｬ wear resistant and durable<br /><br /> Work with external filter｣ｬ easy and convenient｣ｬ can avoid the problem of water draining<br /><br />  <br /><br /> Specification:<br /><br /> Material: Plastic<br /><br /> S Size: 100mm long｣ｬ 12mm outlet diamter｣ｬ 9mm inner diamter<br /><br /> L Size: 135mm Long｣ｬ 16mm outlet diamter｣ｬ13mm inner diamter<br /><br />  <br /><br /> S size suitable for 12\/16mm Hose (3 way pipe｣ｬ 12mm inner diameter｣ｬ 16mm outside diameter hose).<br /><br /> L size suitable for 16\/22mm Hose (4 way pipe｣ｬ 16mm inner diameter｣ｬ 22mm outside diameter hose).<br /><br />  <br /><br /> Package Includes:<br /><br /> 1 x Aquarium Water Flow Control Switch