Star brite Wash Brushes are constructed of a lightweight polymer fiber that will not become brittle and is designed to withstand stains and discolorations. This formulation is resistant to most cleaning chemicals and will withstand temperatures of up to 200F. This high-tech material will not mildew, rot, or absorb odors. Width: 8. Available: Soft Wash Brush Color: Yellow. Medium Wash Brush Color: Blue. Stiff Wash Brush Color: White. Cancer and Reproductive Harm- www.P65Warnings.ca.gov.