Cannon Downriggers UT / Marlin Base. Specifications for Cannon Mounting Base For Uni-Troll: Manufacturer: Cannon Size: One Size Condition: New Color: Silver Quantity: 1 Features of Cannon Mounting Base For Uni-Troll Corrosion and UV resistant. Compatible with all Uni-Troll models. Package Contents: Cannon Mounting Base For Uni-Troll The Cannon Downriggers UT / Marlin Base 2207002 is a quality addition to the Cannon lineup. For more great deals on Fishing Gear by Cannon please browse our Cannon Fishing Gear page. Cannon Downriggers UT / Marlin Base 2207002