Replacement Cat Bag for common screw-in hatches outfitted with with a rim lip to support the bag ring. Fits: Viking, Beckson and Sea-Lect 5 inch screw hatches. Can be used to replace Fat Bags (large capacity, as seen in small photo to the right), Cat Bags (long & skinny), and Net Bags (common in Perception kayaks). It may not work with all makes and models of hatches. Bag is removable and can be your kayak's purse. Outside diameter of the ring is 5 inches. Bag is 10 inches deep. It must rest on an internal rim on the inside edge of the hatch rim. Comes with draw string top. Bag is not water proof. FATCAT