Description:<br /><br />  <br /><br /> Plastic Check Valve One Way Check Valve For Aquarium Fish Tank Air Pump<br /><br />  <br /><br /> Made of durable plastic, and easy to install<br /><br /> Perfect for protecting your air pump by preventing aquarium water reflux<br /><br /> Compatible with standard aquarium air pipe of 4 mm inner diameter<br /><br />  <br /><br /> Specification:<br /><br />  <br /><br /> Material: Plastic<br /><br /> Color: Red<br /><br /> Length: 42MM\/1.66&amp;quot;<br /><br />  <br /><br /> Package Includes:<br /><br />  <br /><br /> 1 x Plastic Check Valve