I have a 3 1/2" (rare) and a 12 coil with covers which fit the X-80 (others?) and they are in excellent like new condition. The coils were bench tested and work as intended. The coil connectors (9 pin) I believe fits a standard hand held X-80 Challenger. These coils were used on a X-80 hip mount which has a different plug (5 pin) and required a patch cord which comes with the two coils You need to make your own determination as to if this coil will fit your particular detector. Both Coils for $150.00 plus $9.00 shipping. (Paypal Pls.) Joe