Flawless materials are the foundation for ensuring the high quality of the final product. This step focuses on checking whether the various raw materials are free of defects, ensuring they can be used in production without hesitation. The inspection includes carbon fiber prepregs, fiberglass mats, resins, molds, EPS cores, metal inserts, threaded inserts, headset bearings, screw fittings, inlays, frame components, and packaging materials (protectors, decorative, and protective films).