ICE520 5.25 inch ceiling speaker with polypropylene woofer is a real steal, and is a cost effective way for the builder or homeowner to add speakers to every room with a fraction of the cost. The ICE520s are often used in commercial applications where good sound is needed in large areas without a huge cost; however, many of our customers are homeowners who and install the ICE520's in hallways, dinning rooms, garages, etc. Features of the 5.25 inch speakers include polypropylene woofers and pivoting PEI dome tweeter for excellent coverage.