You can choose your favorite 3D printing model and color for DIY The different-sided carbon plate supports the arm structure, which strengthens the body's anti-twisting ability and provides space for capacitor installation The receiver compartment is reserved at the bottom of the rear end. Just remove the bottom protective cover to easily match the frequency Optimized for FPV freestyle and RC racing drones Use for SpeedyBee Mario 5 frame kit to upgrade your drone settings and experience unprecedented advanced flight. Perfect for amateurs and competitive racers Top Plate Thickness:2.5mm(T300 3K) Middle Plate Thickness:2.0mm(T300 3K) Bottom Plate Thickness:2.5mm(T300 3K) Arm Thickness:6mm(T300 3K) Camera Mounting Screw:7mm Battery Anti-Slip Pad:Silicone 3mm Compatible Propeller Size:Max 5.1 Inch Motor Mounting Hole Distance:16-19mm FC Mounting Hole:30.5x30.5mm(M3) VTX Mounting Hole:20x20mm(M2) / 25.5x25.5mm(M2) Internal Mounting Height:23-31mm Receiver Installation Space:25x13x6mm GPS Installation Size:18x18x7mm for FPV Freestyle RC Racing Drones Colour:As Shown Material:Carbon fiber + aluminum alloy Package Contents: 1 x Drone Frame Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.