Non-exempt supplies were parts or other materials that had a useful life of less than 12 months. These parts are changed out frequently and are essential pieces in the day-to-day operation of the equipment, but did not qualify due to their short-term use. Items such as drill bits, taps, lubricants and coolants, air filters, and sawblades were previously subject to sales tax. The new law changes these supplies from being taxable to now non-taxable.