Starbrite&';s Extend-A-Brush Heads are the utility brush of this generation. Designed of fibers that do not stain, discolor or become brittle, and resists most cleaning chemicals and withstands heat up to 200F, this brush is the ideal marine cleaning tool. Soft bristles Will not scratch plastic windows Star prene fibers with flagged ends to hold water and cleaning solutions for easier washing This space-age material will not rot, mildew or absorb odors Heads available in soft, medium, coarse