Alarm Controls DL Series – 18″ Amored Door Loop with Mounting Hardware18″ armored door loop used to transfer low-voltage electrical current from the door frame to the door. Available with either plastic (DL-1) or aluminum alloy (DL-2) end caps. Mounting hardware included.Features Standard Features 18″ long armored door loop Mounting hardware included End Caps: DL-1: white and brown plastic DL-2: aluminum alloy Steel jacket resists abrasion and damage DL-1: .250 I.D. steel DL-2: rugged .375 I.D steelOptions Custom lengths available DL-2ELECTRO DL-2 with ElectroLynx connector DL-24 DL-2 w/ 24″ armored door loop DL-30 DL-2 w/ 30″ armored door loop DL-36 DL-2 w/ 36″ armored door loop DL-48 DL-2 w/ 48″ armored door loop DL-60 DL-2 w/ 60″ armored door loop