High pressure tire DOT, DOT certified low-pressure tires, ultra low-pressure tires DOT certificate main products exported to the US and parts of transport vehicles: cars, buses, multi-passenger cars, trucks, motorcycles, trailers and other parts: brake soft pipes, lights, reflective devices, and associated parts, tires, rims, brake fluid, warning triangle, glass, seats, seat belts, child protection systems, helmets, etc. DOT certification features self-certification process, namely the manufacturers themselves to determine whether the product meets standards; Ministry of Transportation will not issue any certificate to the applicant; annual compliance testing is a powerful tool to check the manufacturers to prove the effectiveness of self; in all the required certification vehicle and parts, only brake hoses, tires and glass three parts manufacturers will receive Department of Transportation DOT number assigned.