The seat adjustment knob (1 9/16 inch diameter - 9/16 inch thick - M6 threads) common on a Dagger white water kayak, such as the Dagger Momba 7.6 and 8.1 (circa 2013) and Jitsu 5.5, 5.9 and 6, outfitted with the Contour Ergo Outfitting Play Seat System. Also sold as a Parts Kit with screws and washers. OUTKNOB
