Kicker 5.25" 200W (Pair) + Kicker 6.5" 240W 2-Way Car Coaxial Speakers (Pair) Kicker 41DSC54 5.25" 200W ,Two 2-way speakers,5-1/4" polypropylene woofer with ribbed polyester surround,2 Grilles,1/2" Balanced DomeFrequency Response 45 - 20k Hz Kicker 41DSC654 6.5" 240W ,2 Grilles,2-way car speakers (pair),6-1/2" polypropylene woofer with ribbed polyester foam surround They use polypropylene cones with tough, ribbed, UV-treated surrounds for precise linear excursion and reliability lightweight 13mm PEI-dome tweeters offer superb clarity and volume.