This is a set of materials for the QC Kentei (Quality Control Certification) Level 3, including a textbook, a problem book, and DVDs. - Material Name: QC Kentei Level 3 Textbook - Material Name: QC Kentei Level 3 Selected Problem Book - Material Name: QC Kentei Level 3 Pass Lecture DVD (2 discs) The textbook has only been read a few times and has no writing or markings. The problem book is unused. The DVDs have only been watched once, and the discs have no scratches. Due to the nature of the product, returns and exchanges are not accepted. Please understand and agree that these are used items before purchasing. Quality Control Certification