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 power handing 44.4mm(1.75inch ... diameterΦ25.4mm(1inch)Depth63 mmNet weight1.6 kg 1.75 inch Hot Sale Alumium Tweeter Driver