Hard Start Kit 500% Boost Torque 6000-120000 BTU 1/2-10hp 115-250v - STT-6 UL Certified with installation wiring instructions included Voltage: 115-250V Contains relay and start capacitor for extra starting torque For all PSC A/C units from 6,000 to 120,000 BTUs (1/2 thru 10 HP) Increases starting torque up to 500%