Features: Engineered with advanced noise reduces technology, the for 4T/4 1157F2 Low Noise Propellers reduce operational noise by 30% while enhancing flight stability and efficiency for smoother, quieter drones performances. Featuring aerodynamically optimized propellers from lightweighted, durability composite materials, these propellers ensure superior strength to weight ratio and prolonged life under demanding professional conditions. Ideal for commercial drones operators, aerial photographers, and industrial inspectors requiring minimal environmental disrupting during sensitive operations in noise regulated zones. Perfectly for wildlife monitoring in nature reserves, or closed set cinematography where quiet flight and precise maneuverability critical. The easy installation design allows quick propellers swaps, optimizing workflow efficiency for time sensitivedly missions without compromising for 4t/4 compatibility or flight safety standards. Specifications: Product Name: for 4t/4 propellers Product material: ABS Product size: Not expanded: about 14x4cm/5.51x1.57in Expanded size about 30x3cm/11.8x1.18in Package Includes: A pair of propellers note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution