Tri Volt Electromagnetic Door Holder Back to Back Door Floor Mount Opening Action Electromagnetic Release Aluminum Amp Draw @ 12V 0.08 Amp Draw @ 24V 0.04 Input Voltage 120/24/12 Total Projection 8 1/4 in Holding Force 30-40 lb Sprayed Aluminum Finish Standards ANSI/BHMA 156.15 UL UL of Canada Cal. State Fire Marshal