40w,20w fluorecent ballast, Class B2, Class C are all available, All designs are available, 100% silicon and 100% copper . ALuminnum wire ballast 's quality is also no complaining. 40w,20w fluorecent ballast, Class B2, Class C are all available, All designs are available, 100% silicon and 100% copper . ALuminnum wire ballast 's quality is also no complaining