Buck Algonquin Bronze Port Rudder Inside Mount 1in. 00Rp100L 1 in. Bronze Rudder Port Inside mount Square flange Complete with packing nut and lock nut 1/4 in. packing size 2 1/8 in. length under flange 3 1/2 in. flange size 2 3/4 in. bolthole 3/8 in. bolt size 2.45 lbs.