10pcs Plastic Fish Tank One Way Non-Return Check Valve for Co2 System Aquarium Air Pump Compressor Aquarium Accessories

Structure : control Port Size : 4mm Pressure : Low Pressure Power Source : DC Standard or Nonstandard : Standard Actuator Mode : Without Manual And Instruction Media : Water Power : manual Material : Plastic Temperature of Media : Low Temperature NC or NO : Normally Open Size : 4mm Inner Diameter Type : Plastic Check Valve Feature 1 : Aquarium Check Valve Feature 2 : Valve for Aquarium Air Pump Feature : Aquarium SuppliesPack：10pc