Nokta Makro Simplex 13.5" x 12.5" Waterproof DD Search Coil (SP35) is for use with the Nokta Makro Simplex+ metal detector. This is an optional search coil for the Nokta Makro Simplex+ and Simplex+ WHP metal detectors. Semi Elliptical in shape, this larger sized coil that will detect individual targets such as coins, relics and jewelry with great accuracy. This is not compatible with other models of Nokta Makro metal detectors. Includes coil cover and coil mounting hardware. Requires Simplex software version 2.76 or higher.