A. Replace old or damaged propellers to make your x4 H107L, H107C, H107D drones look in good condition. B. Stylish design with two colors that can match your drones. C. Made of relatively good - quality plastic, durable and lightweight. D. Easy to install and disassemble, convenient to use. E. Quick installation and release, with relatively powerful thrust and good balance performance. F. Dimensions: 180 x 23 x 17 mm / 7 x 0.9 x 0.67 inches G. Package contents: - 10 black propellers - 10 white propellers H. Precautions: - Only propellers are included, and drones are not included. - Clockwise (CW) propellers should be installed diagonally, and the same goes for counter - clockwise (CCW) propellers. I. Our products are made of relatively good - quality materials to provide you with a better user experience. J. We will try to ship the order within three days after purchase, and the estimated delivery time is 8 - 15 days. K. When shopping, please pay attention to the product's dimensions to ensure they meet your needs. We have provided detailed product information, including its features and specifications, in the title and description. L. We hope you are satisfied with your purchase. Therefore, if you have any questions or concerns, please feel free to contact us. We will try our best to assist you. M. Thank you for choosing our products. Have a great time using them!