Mark4 FPV drone frame by Readytosky made of carbon fiber, available in frame sizes 225 mm, 260 mm and 295 mm (approx. 8.9 in, 10.2 in and 11.6 in). Designed for assembly with LiPo batteries and standard RC components; intended for remote‑control vehicles and FPV builds. Robust, lightweight construction for competitive or hobby racing drones.