5 PCS Home Black Red Plastic Co2 System Air Pump One Way Non-Return Aquarium Check Valve

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

1X 5 PCS One Way no return Check Valve