This is a great handheld self-pressurized hand sprayer for pretreatment of any kind. You can use it for light or dark pretreatment and it lasts up to 20 shirts. Use it in a pinch to get that one white shirt pretreated for a waiting customer (why must they wait for their order?) or use it for small production runs. If you don't have a wagner sprayer or automatic pretreatment machine, then this is one of your best options. People used to LOVE the aerosol pretreatment cans...this is honestly the next best thing!