HAPPYMODEL HMF U580 Pro Totem Series 4 Axis Foldable Rc Drone Quadcopter Frame Kit Rack Carbon Umbrella FPV Landing Gear 16mm Carbon Fiber Tubes. High-Intensity PCB Center Board With Soldered Point. Wheelbase: 580mm. Weight Of Frame: 640g Suitable The 2212, 2216, 3108, 3110, 3508, 3510, 4108 Etc Motors Suggest 10 - 15 Inch Propellers The Batteries From 3S 2200/2600/4000/5000mah To 4S 2600/4000/5000mah All Can Be Used.