The E88 Pro Drone Accessories is made of ABS plastic. Eco-friendly durable, and wear resistant. Easy to install, you can install it on your drone easily. 8 different replacement parts you can choose: 4 piece motor with moter base / 1 piece circuit board / 4 piece black drone arm / 4 piece gray drone arm / 1 piece black upper shell / 1 piece gray upper shell / 1 piece black lower shell cover/ 1 piece gray lower shell. Great spare parts with perfect fitness for E88 Pro drone. Size Chart: Motor Size: approx. 3.2x1.7x2cm / 1.26x0.67x0.79 inch Circuit Board Size: approx. 4.5x2.8cm / 1.77x1.10 inch Black Arm Size: approx. 9x2x4.4cm / 3.54x0.79x1.73 inch Gray Arm Size: approx. 9x2x4.4cm / 3.54x0.79x1.73 inch Black Upper Cover Size: approx. 12x5.5x2.5cm / 4.72x2.16x0.98 inch Gray Upper Cover Size: approx. 12x5.5x2.5cm / 4.72x2.16x0.98 inch Black Lower Cover Size: approx. 11.5x5.5x4cm / 4.53x2.17x1.57 inch Gray Lower Cover Size: approx. 11.5x5.5x4cm / 4.53x2.17x1.57 inch Package Includes: 1 Set Drone Spare Parts Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you