Review on 🔋 Enhance Fuel Efficiency with Moeller 2-Stage CARB Fuel Cap for Portable Fuel Tanks by John Martin

I bought this cap as a spare and it fits perfectly. The one I received in July 2019 is different from the one pictured on the Revain website but has a red top as shown in the reviews. I can press a button to release the pressure, otherwise I don't know if it works properly as the plastic container seems to expand in direct sunlight.