Features: Isolate the propeller to avoid injury or damage caused by foreign objects and improve flight safety. High-toughness materials, strong impact resistance and compression resistance, reducing accidental damage to the machine. Strengthened structure, and the anti-collision for protection is further upgraded. Lightweight and compact in size, the whole set weighs only 51.3g, portable to carry and store. Quick release designed for Holy Stone HS720/720E RC drones, easy to install and disassemble. Specifications: Material: ABS Applicable Models: for Holy Stone HS720/720E Color: Black Net Weight: 51.3g Radius: Approx. 10 for cm/3.93 inch Max Size After Installation: Apprxo. 40.5x37.5x5.5 for cm/15.94x14.76x2.16 inch Note: 1.Does not include Drone, 2.Transition: 1cm=10mm=0.39inch, 3.Please allow 1-3mm error due to manual measurement. please make sure you do not mind before ordering, 4.Due to the difference between different monitors, the picture may not reflect the actual color of the item,please make sure you do not mind before ordering, Package includes: 4 Pieces/set Propeller Proective Guards