Single Pole Dual Pressure Control, SPST Switching, 20" Wc to 100 Psi Low Pressure, Lockout ( Manual Reset ) Differential Low Pressure, 100 Psi to 500 Psi High Pressure Range, Lockout ( Requires Manual Reset ) Differential, 36" Capillary with 1/4" Flare Nut Connection, "All Range" for R-12, R-22, R-134A, R-500 and R-502