Our company is professionally copperhead bbsmanufacturer. We can according to your required to produce. We are 4.4mm H & N copper coated LEAD BBS manufacturer in China, and aslo sale flashlight speaker for outdoor. In the past we are export 6 MM, 4.5mm, 4.4mm, BBS, to Russia and USA, also we have lowest price and good quality, we can do OEM, please let me known if we can do business in BBS for shot. If you are interested in our produced you can con tact me.