Get the best of both worlds with the professional use Stihl SR 450 backpack blower and sprayer. Designed with a larger, more powerful engine for increased spray range, this multi-task tool is great for clearing debris or spraying insecticide, fertilizer or herbicides- even watering. Providing all the power and convenience you need for excellent professional sprayer coverage. Sometimes referred to as a gas liquid weed sprayer or pesticide tank sprayer.