Speaker Voice Coil Speaker Parts 1)Bobbin Material: AL,ASV,KSV,Capton,Glass-fibre,NSV,TIL,BASV,etc. 2)All models and sizes Speaker Voice CoilSpeaker Parts1)Bobbin Material: AL,ASV,KSV,Capton,Glass-fibre,NSV,TIL,BASV,etc.2)All models and sizes are available 3)We can supply all kinds of speaker voice coils according to your requirements. Speaker voice coil bobbin materialAl, ASV, KSV, NSV, Kapton ...