Hayward GG Series Gauge Guards are available in PVC, CPVC, PP and PVDF. All gauge guards have an FPM diaphragm. Gauges are offered in 0 to 30 PSI, 0 to 60 PSI, 0 to 160 PSI, and a stainless steel gauge of 0 to 160 PSI. Gauges and guards can be separate or mounted together.