NEL BIG For Garrett Ace Series Metal DetectorsBig is the deepest coil in the world for different metal detectors, which is confirmed by tests of independent experts in the various forums and searchers at metal detecting meetings! It is recommended to use as a coil for deep searching. Coil is excellent for finding large targets as well as for small targets which are 1g and more at 25 cm depth. This coil is superior to standard coil in depth by 70% (Ace 150 250 200 300), 50% (Ace 350 Euro 400) and