The Cutler-Hammer BAB1020 is a 20 amp Quicklag 1-Pole Bolt-On circuit breaker designed for AC current with a voltage rating of 120/240 V. It features a thermal circuit breaker interruption type and has a maximum amperage of 20 A. The breaker is black in color and measures 8 inches in height and 10 inches in width. It is manufactured by Cutler-Hammer, now known as Eaton.
New quality at used pricing, looked and performed like new but for less than half of what my local supplier wanted to charge me! As far as the breaker goes, obviously your looking to add a breaker to an existing panel and you don't really have a choice in the breaker that you use. Other than the difficulty in sourcing them, these are great breakers. Easy to install and works like a charm.