3M 99422NA Sanding Sheet, 9 in x 11 in, Silicon Carbide, 220 Grit, 25 PK G322639282 Residential Use Preset Pressure Settings Residential Use Preset Pressure Settings 50 psi Valve Type Standard Connection Double Union FNPT Material of Construction Lead Free Bronze Seat Material EPDM Disc Material EPDM Factory Set Pressure 60 psi Flow Rate Continuous Maximum 48 gpm Operating Pressure Maximum 400 psi Pilot Adjustment Maximum 75 psi Inlet Connection Type NPT Operating Pressure Minimum 15 psi Fluid Temperature Maximum 180 Degrees F Coating Lining NSF Listed Fusion Bonded Epoxy Lining and Coating NSF Certifications for Food and Drinking Water NSF 61 Includes Strainer Strainer Included Pilot Adjustment Minimum 15 psi For Media Water Outlet Connection Type NPT Country of Origin United States Medium Duty surface work and can be used wet or dry It works well for sanding old finishes