The powerful 6" x 11" DD Viper Searchcoil included on the Garrett APEX detector is now available for other Garrett detectors. This ACE Viper coil is made for existing (non-APEX) metal detectors, such as: ACE 400, ACE 300, ACE 250, ACE 200, ACE 150, etc. Vipers Unleashed for ACE / AT.