These insulators also come with a letter B marked in between the wire groove and base. They also have the numbers 7,8,ten,11,12 and feature a dot at the top. The CD 141.9 Emminger’s glass insulator is an all-time classic collectors, even seasoned ones, drool at the word Emminger’s. In addition to the dome-shaped prime, the insulator comes with a h…[Read more]