"LEAD CORE" Trolling Line.  Mason is proud to introduce Lead Core Deep Water Trolling line.  This fast sinking line is composed of abrasion resistant Braided Nylon over a flexible lead core.  It is color metered every ten yards with non fading dye for exact depth control.  This smooth and easy to control line is a must for every deep water fisherman.  Available in  100 yard spools.  Also suggested for fly fishing.