Choose Option TACO Marine T-Top Extrusion Plate, For Grand Slam Mounts, Pre-Drilled, Pair OverviewThe TACO Marine GSE-1939 is a pre-drilled T-top extrusion plate kit made for installing Grand Slam outrigger bases into a boat T-top. It gives fabricators and installers a ready mounting surface for Grand Slam 200, 300 and 400/500 series bases,... $429.99 - $624.99 Choose Option Compare