ITEM NAME:2 PCS Non-Return Check Valves for Aquarium Air Pump D9V2 2 PCS Non-Return Check Valves for Aquarium Air Pump D9V2 2 PCS Non-Return Check Valves for Aquarium Air Pump. They are made of plastic material for long time use. The Aquarium Valves are important accessories for air pumps. Measuring approx. 2.08" long, 0.56" diameter. Tip outside diameter: ~0.18" * Specially designed Non-Return Valves will protect you air pump by preventing aquarium water from back siphoning during a power outage. * Place these Air Pump Valves in your airline tubing between your air pump and aquarium water to prevent water returning down the air line. * Package Included: 2 x Check Valves Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
