The 4532 series Overhead Door Switch Set is a miniature, low-profile reed switch in a cast aluminum for durability in harsh environments. The 4532 features a wide working gap of up to 2" with two feet of heavy duty armored cable for protection from the elements and a versatile universal magnet which can be mounted at various angles for those difficult installations. Also known as -G.R.I. Telemark Corp. OH DOOR MINI 2 GAP - GI-4532