Starbrite - Premium Wash Brush - Synthetic Wood Block w/Bumper - Blue - Medium - 8" - 40171 Performance, technology and durability. Just a few of the many reasons our premium brush head is the best money can buy. Features: Lightweight synthetic block combines the beauty of wood with extreme durability Impervious to exposure to UV rays, cleaning agents and weather Bumper edges help prevent scuff marks Fits all Extend-A-Brush handles Medium fibers with flagged ends are ideal for cleaning soiled and stained surfaces