ISTA 4pcs AIR FLOW CONTROLLER Valve 4/6mm tubing adjust aquarium fish tank

The Ista plastic airline control valves are ideal for adjusting the air flow to your aquarium from your air pump.lastic airline control valves are ideal for adjusting the air flow to your aquarium from your air pump. These control valves are supplied in a pack of 2. The control valves will fit standard 4mm internal / 6mm external aquarium air line. Ista specialise in planted aquarium equipment and supplies, so you can be sure that these control valves are one of the most advanced on the market and made to the highest possible quality.