This petcock philtre gauge cap is compatible with most universal 7 gallon generators that use gas as a power source. It is designed to fit snugly and securely, ensuring that the gauge reads accurately and reliably. The cap is made from high-quality materials, making it durable and long-lasting. This gauge is perfect for those who need to monitor their generator's fuel pressure, ensuring that it runs smoothly and efficiently. It is easy to install and use, and is a essential accessory for any lawn mower or outdoor living space.