| W31 National Standard Journeyman Mechanical Questions Workbook | $81.99 |
| W32 National Standard Residential Mechanical Exam Workbook | $81.99 |
| W29 National Standard Master Mechanical Questions Workbook | $167.98 |
| F31 National Standard Journeyman Mechanical Questions Workbook | $86.99 |
| G31 Journeyman Mechanical Exam 2018 Paperback Version | $86.99 |
| F32 National Standard Residential Mechanical Exam Workbook | $81.99 |