Features: The outer cover of the check valves are made of silicone rubber The specific pressure range of silicone rubber check valve: Opening pressure: 0.001MPA (0.01kg water pressure) Reverse back pressure: 0.5MPA (5kg water pressure) Principle: The fluid can only flow along the water inlet, but the medium at the water outlet cannot flow back. Specifications: Material:PP Diameter 3mm,4mm,6mm(optional) Package Includes: 1x Plastic Check Valve note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.
eBay