The 9" x 5.5" Blade-X Search Coil suitable for Q30,Q30+ ,Q35 and Q60. There are numerous advantages that come with this search coil. First, it does not weigh very much, meaning it will not fatigue the arm of the user. This is a good search coil for longer hunting sessions. Next, the small size of this search coil means that it can also fit into small, tight spaces that might not be accessible with other coils. Finally, this coil is also one of the most durable options on the market. It has a long lifespan and can handle the wear and tear of frequent use.