Check Valve Stainless Steel One Way Non-Return Check Valve For Aquarium Co2 System Aquarium Co2 Diffuser

Product description Specifications: Material: Stainless Steel Size:8 x40mm/3.15×1.57(DxL) Application: 4 mm inner diameter tube. Color: Silver Weight: 15 g Quantity:1PC Feature: One way professional check valve.Small and compact about 4cm long. Can prevent the aquarium from the water flowing back which is caused by the decrease of CO2 pressureand keep the function and service life of CO2 bottle. Easy to install no additional tools required can be connected to any location in seconds Fits standard aquarium CO2 pipe(4mm inner diameter and 6mm outer diameter) . Suitable for CO2 supplying system in fish tank aquarium and others.