Big Boat Brush/Bi-level Blue. Medium duty Bi-Level 10' head for all around cleaning of soiled and stained surfaces. Star brite Extend-A-Brush heads are made with Star prene, 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. Star brite poles are constructed with aircraft grade, triple anodized aluminum for years of maintenance-free use. Features:- Medium duty Bi-Level 10' head for those big cleaning jobs. 10' head covers a lot of area for fast cleaning. Excellent all around brush. Fits all Extend-A-Brush Premium Handles.