5 PCS Durable Fish Tank Plastic Co2 System One Way Non-Return Air Pump Aquarium Check Valve

Label:Yes Material: Plastic 100% Brand new and high quality Protect you air pump by preventing aquarium water from back siphoning during a power outage. Color: Black Transparent;Red Transparent Small and easy to install Made of durable plastic The necessary parts for your air pump aquarium O2 system Great one way check valve for aquarium air pump Compatible with standard aquarium air pipe of 4mm inner diameter Size: As The Shown Price difference quality is huge different for this item quality

1X 5 PCS One Way no return Check Valve