Compression cartridges, 4 inch centers, 3-hole installation. Top mount design. Metal fluted handles with acrylic idex buttons. One piece heavy chrome plated, solid brass casting. 2.2 gpm maximum aerator @ 60 psi. Heavy chrome plated finish. Limited lifetime warranty. Chrome Gerber Classics Two Handle Centerset Lavatory Faucet W/ Metal Fluted Handles & Less Drain W/ Button 1.2GPM