Need a rugged, reliable gas cap for a boat, generator, or industrial fuel tank? This Kelch 1/4-turn vented gas cap is a serious piece of hardware. It's made in the USA and built tough. The '1/4-turn' part means it locks and unlocks super fast – just a quick twist and it's secure. It's vented, which is crucial for letting air in as fuel is used, preventing a vacuum lock that can make engines hard to start or run poorly. The coolest feature? It has an integrated fuel level gauge right on the cap itself! Just pop it open and check the visual gauge to see how much fuel you have left without needing a separate dipstick. This one is the 13.5-inch size (that's the length/depth of the dipstick gauge part). The manufacturer part number is 7J203529. Brand new in the box. Perfect for marine applications, construction equipment, or backup power systems where you need to monitor fuel at a glance. A high-quality upgrade over a basic cap.