Jardin Plastic Air Pump Outlet 3-Piece Check Valves for Aquarium， Blue</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Product Name : Check Valve</li><li>Use for : Fish Tank， Aquarium; Hole Diameter : 3mm/0.11"</li><li>Total Size : 3.5 x 1.7cm/1.4" x 0.66"(L x D)</li><li>Material : Plastic; Color : Blue; Weight : 6g</li><li>Package Content : 3 Pcs x Aquarium Check Valve</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/41LBZDYdSVL.jpg' noproxy></br>