Potensic UDI 818A Quadcopter Motor Set (Motor A and Motor B) Spare Part Designed to keep your UDI 818A running continuously With stable performance, it is practical and durable Suitable for: UDI 818A Dimensions: (5.91 x 0.35 x 0.35)" / (15 x 0.9 x 0.9)cm (L x W x H) Package Includes: 1 x Motor Set (motor A and motor B)