Specifications:

4-inch bare metal head carton

4-inch European standard carton with one electric charge

4-inch one-electric one-charge American standard carton

4-inch Australian standard carton with one electric charge

4-inch British standard carton with one electric charge

4-inch two-electric one-charge European-standard carton

4-inch two-electric one-charge American standard carton

4-inch two-electric one-charge Australian standard carton

4-inch two-electric and one-charge British-standard carton