Created specifically for Spark's propellers. The propeller guards help reduce the risk of cutting objects or harming people. They are small, lightweight, easy to mount, and detach. aids flight safety, protecting people and objects from spinning propellers. Propeller guard (pair) × 2specificationsweight (single unit): 9.5 gradius: 145 mm installation circumference: 266×266×55 mm. Compatibility : Spark - Quick-Release Folding Propellers.