The YakAttack GridLoc Through Hull Wiring Kit makes it easy to route wires through your kayak hull or BlackPak Pro system without needing backside access. Compatible with the GridLoc mounting pattern, this kit includes multiple rubber inserts for various wire sizes and ensures a clean, professional install. Compatible with GridLoc and BlackPak Pro No backside access required Requires 1" installation hole Includes 14 rubber inserts in various sizes 4 blank inserts for custom drilling Fits wire diameters from 0.08" to 0.389" Includes 2 nylon grommetsHole Diameter Sizes: A - 0.166" x 2 units B - 0.191" x 2 units C - 0.205" x 2 units D - 0.265" x 2 units E - 0.345" x 2 units F - Blank x 4 units G - 0.08" x 2 units H - 0.389" x 1 unit (two halves)