Our pressure gauges come with a durable stainless steel case and brass thread. They are also glycerine filled to avoid inaccurate readings during vibrations. The PGSB series of gauges come in 3 standard sizes, 40mm, 63mm and 100mm. They come with either a back connection or bottom connection for ideal connectivity. These pressure gauges are suitable for a variety of mediums, including water, compressed air, oil and fuel. They are suitable for gaseous or liquid media that will not obstruct the pressure system.