An easy-to-install in-ceiling speaker system that has magnetic grilles and high sound quality designed to meet various custom installation requirements. Yamaha NS-IC800 In-Ceiling Speakers Features:High Sound QualityMoisture resistant 8 blue PP (polypropylene) mica cone woofer for high performance mid-low sound reproduction1 fluid-cooled soft-dome swivel tweeter delivers pure high frequency with precise sound positioningUnique DesignGrain-finished acoustic baffle with spiral pattern for natural sound dispersionSlim profile design for flush in