Sell Colo 10x Aquarium One-Way Check Single-Way Fish Tank Air Pump CO2 System Red best price

One way Durable Efficient and effective protection of your pump Large one-way valve for aquarium air pump. Checkback anti - siphon valve can protect your electrical equipment. (air Pumps, etc.) Color: red Material: plastic Length: approximately 5.50 cm/2.17 inches Number: 1 set (10) The package includes: 1 set (10pcs) x one way check valve (excluding other)