Features heavy-duty composite construction for strength and UV resistance.This is the Legacy Uni-Troll mounting base. A Cannon Universal Base is also available.For other Cannon downrigger models check out the Cannon Universal Base.Fishing is our passion, and it runs deep. At Cannon, our love of fishing is only matched by our passion for building unstoppable downriggers, rod holders, mounting system and all the gear you need to put more fish on deck Cannon Mounting Systems help rig the system in your favor.