Beckson "Beckson Marine x 12 x 1 Self Drain Opening Port 5, PO512-WC-10"

"Beckson Marine x 12 x 1 Self Drain Opening Port 5, PO512-WC-10. This design promotes drainage without having the hassle of making angled cuts in the hull. This also allows for thru-bolting which is impossible in windows where an angled spigot extends below the bolt holes.