In Wall Spring Wound Timer for 110V application 20 amp 5-720 minute.spring wound timer switch.wall swich timer. ... more reasonable. And the work reliability has been increased substantially. Time range is 5min,15min,30min,60min,2hours,3hours,4hours,6hours ... as start-stops, half-way stop and time error. According to customers' requirements, the time tolerance can be 5% - 15%. Our current ...