Garrett | 6.5" x 9" PROformance DD Search Coil for ACE Series - CSI 250 | LMS Metal DetectingGarrett 6. 5" x 9" PROformance DD Search Coil for ACE Series CSI 250 This coil is standard with the Garrett ACE 150, 250 and 350 metal detectors. This will also be perfect if you prefer the CSI 250 from Garrett. Used for general purpose hunting, which typically includes coins and coin sized targets, this medium sized search coil is the best choice. It provides the best combination of magnetic field concentration, detection depth and capability to