MERCURY Dual Action Hand Sprayer. MERCURY a useful hand sprayer for your favorite flowering and other plants. MERCURY is the only sprayer which has double action. Easy spraying double action spraying is a unique technique which allows you to spray during press & release of the spray trigger. MERCURY Hand sprayer has comfortable and reliable spray head which is economics handle fitted with adjustable nozzle which sprays on your favorites plant and can also adjusted to jet/spray setting for clearing.