Model # A - B - C - D 5 lbs. 9" 4-3/4" 6" 3/8" 10 lbs. 12-1/2" 7" 8" 3/8" 15 lbs. 12-1/2" 7" 8-1/2" 3/8" 20 lbs. 12-1/2" 7" 8-1/2" 3/8" 28 lbs. 13" 9" 10-1/2" 3/8" * Model # Boat Size 5 lbs. Up to 12" 10 lbs. 12" to 15" 15 lbs. 15" to 17" 20 lbs. 17" to 19" 28 lbs. 19" to 21"