Propeller Cage. Features: The Mavic Pro Propeller Cage is specifically designed to protect people and objects from spinning propellers, improving overall flight safety. Require to used together with Mavic - 7728 Quick-release Folding Propellers. The aircraft becomes heavier after mounting it, but the flight time can still be up to of 12 minutes, suitable for flying indoors. Package includes: 4x Propeller Cage, 2x Securing Lock and 3x 7728 Propeller Pair. Compatibility: Mavic Pro and Mavic Pro Propeller Cage Propellers.