2 Pack Pool Spa Filter Water Pressure Gauge 0-60 PSI 1/4" Pipe Thread Back Mount Swimming Pool Spa Filter Back Mount Pressure Gauge 0 - 60 PSI 1/4" Inch Pipe Thread 2 Pack Back Mount Pressure Gauges Compatible with most Pool & Spa Cartridge and D.E. Filters 2" Dial Face 0 - 60 PSI Reading