One way
OOTDTY
Durable
Efficient, Effective for protection for your
Great one way check for valve for aquarium air
Non Return anti syphon valves to protect your electrical equipment. (air pumps etc)
Colour: red
Material: Plastic
Length: about 5.50cm/2.17"
Quantity:1Set(10pcs)

Package Includes:

1Set(10pcs) One Way Check Valves(not included others)