Star brite 10" Big Boat Bi-Level Brush Medium (Blue) For those big cleaning jobs. 10-Inch head covers a lot of area for fast cleaning. Fits all Extend-A-Brush Premium Handles. Excellent all around brush. *Star prene is a lightweight polymer fiber that does not stain, discolor or become brittle. It resists most cleaning chemicals and withstands heat up to 200F. This space age material will not rot, mildew or absorb odors.