HONREY CABLE, as one of top electrical wire distributors, will provide you technical data sheets with the cable drawing when we sent you the quotation, and if needed, we also can provide a pre-production sample before mass production; we not only test the raw materials before production, but also have the test during the production , when finished the mass production, we have at least two times of final Inspection before shipment, at the same time, the final test report and the video of test process will be sent you before shipment.