Welcome to the store! Cultivate children's practical and thinking abilities, and let them develop a good learning habit. It belongs to the physics science teaching apparatus, making teaching more vivid. Can be used with 2x2mm carbon fiber rod, with a wide range of applications. Made of high-quality ABS plastic material, durable in use. Safe and environmentally friendly, use with confidence. Item Type: Coreless Motor + Propeller Material: ABS Plastic Suitable Age: 7-14 Years Old Coreless Motor Type: 716, 720, 8520 (Optional) 1 x Propeller 1 x Coreless Motor 1 x Motor Sleeve 2 x Gear 1 x Gear Shaft 1 x Plastic Pad 2 x Metal Prop Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will give you the best solution!