1.Tweeter driver/speaker driver 2.1.75",ferrite magnet,Maylar diaphragm driver 3.Great high quality sound,high sensitivity driver/tweeter driver/speaker driverFEATURES: 1.75", ... ferrite magnet,Maylar diaphragm driver 106dB sensitivity in 1w/1m 50W ... mmNet weight1.6 kg 1.75 inch Hot Sale Alumium Tweeter Driver