Product Name 40*20mm speaker Related model 0.5inch,1.0inch,1.5inch,2.0inch,2.5inch,3.0inch,3.5inch,4.0inch,4.5inch,5.0inch,5.5inch,6.0inch,6.5inch,8inch,10inch,12inch,18mm,20mm,23mm,26mm,27mm,28mm,30mm,31mm,32mm,34mm,36mm,40mm,42mm,45mm,50mm,52mm53mm,57mm63mm,66mm,78mm 82mm89mm92mm102mm105mm .Round shape or square shape etc..please contact us and provide for your
