This Noshok Vacuum Gauge 25-4300 is a high-quality tool that is perfect for any HVAC or refrigeration system. It is designed with a 1/4" NPT bottom connexion and is suitable for use in a variety of settings, including business and industrial environments. The gauge is made by Noshok, a trusted brand that is known for producing reliable and durable equipment. It is designed specifically for vacuum purposes and has a dry fill, making it ideal for use in HVAC. This gauge is a must-have for anyone who wants to ensure that their system is running smoothly and efficiently.