... and ballast) Reflector, adjustable extender, hook, connected plate High bay light fittingGear box(fixing ignitor, capacitor and ballast)Reflector, adjustable ... extender, hook, connected plate Adjustable extender for hight bay lightHave 3 types for HF-400GBR-D/HF-400GBR/HF ... . Workable with diferent size and shape of aluminum reflector to satisfy all kinds of lighting needs.3. Widly used ...