Tri Volt Electromagnetic Door Holder Adjustable Opening Action Electromagnetic Release Aluminum Amp Draw @ 12V 0.04 Amp Draw @ 24V 0.02 Input Voltage 120/24/12 Projection from Wall 3 3/4 In. Total Projection 4 1/8 In. Holding Force 50-55 Lb. Armature Length 4 5/8 In. Armature Width 2 3/4 In. Armature Depth 1 5/8 In. Sprayed Aluminum Finish Standards ANSI/BHMA 156.15 UL UL of Canada Cal. State Fire Marshal