Features:
Nice one way check valve for aquarium and fish tank. Suitable for fresh water and sea water.
Protect your air pump by preventing aquarium water from back siphoning during a power outage.
Tip outside diameter : ~5mm; Material : plastic
Total size : ~3.4 x 1.8cm / 1.3 x 0.7"(l*d)
Package Included: 10 Pcs x Air Check Valve