Magma Products Rock - N - Roll Boat Stabilizer, Anti-Roll Fully open 36 x 21 (91.5 cm x 53 cm) 756 square inches of resistance (4878 sq. cm) Folds flat for storage 10-1/2 x 36 x 3 (27 cm x 91.5 cm x 7.5 cm) Includes 3/16" dacron bridle assembly Weighs only 18 lbs. (8 kg), complete with attractive rugged storage case 1 year warranty