Jolly Logic Chute Release Chute Release lets you control the altitude your rocket parachute opens For rocket flights higher than 200 feet (60m) above ground level For rockets 1.6" (41mm) in diameter and larger (may work in some 38mm rockets) 17.5 g (0.6 oz) Weight 54 x 31 x 10 mm (2.1 x 1.2 x 0.4 in)