Optimair TL Kit (2) TR-6600 Prefilters, (2) TR-662 Spark Arrestors, Airflow Indicator, BT-922 Breathing Tube Cover, Battery, Charger, HE Filter, S-433L Hood with Integrated Head Suspension, TR-627 Easy Clean Belt, TR-653 Storage & Cleaning Kit, TR-6700 Fi. Ideal for industrial and commercial applications.