The 12.5" PROformance Imaging search coil fits the GTI 2500 detector. Provides true depth and size when cache and relic hunting. Rugged and tough, yet lightweight, the PROformance searchcoils maintain Garrett's high standard of operating stability, versatility and maneuverability in virtually every hunting environment. All PROformance coils feature heavy-duty, seamless epoxy-filled technology for the ultimate in weather and water-proofing. Each PROformance coil also sports an open design, which provides easier movement through water and near-neutral buoyancy as well as excellent visibility of the ground beneath the coil - an invaluable feature when pinpointing!