OSR SYSTEM , is a unique inverted spray aerosol spotter that removes water and oil base spots and stains from carpet and upholstery. Eliminates the need for rubbing and scrubbing. Leaves no visible residue. Will not harm carpet backing or upholstery foam. Neutralizes odors caused by stains. Excellent pre-spotter prior to carpet extraction. Inverted spray valve provides easy waist-high application.