Mounting base for large body electric Cannon downriggersnFeatures 316 stainless steelnIncludes: superior corrosion resistancenCannon Mounting Bases - Magnum and Digi-Troll for large-body electric Cannon downriggers the standard base features heavy-duty Lexan construction for strength and UV resistance Upgrade to the 316-grade stainless steel model for unrivaled protection against rusting pitting and corroding