Box of 12 NEW Siemens Circuit Breaker B120 1 Pole 20A 120/240V 60Hz Type BL The top of the box is missing, but the breakers inside have never been used or installed. We have 5 of these boxes available. The product is a box of 12 new Siemens circuit breakers, specifically the B120 model, with a maximum amperage of 20A. These one-pole breakers are rated for 120/240V and 60Hz, making them suitable for various electrical applications in a commercial or industrial setting. With the trusted Siemens brand name, these circuit breakers are reliable and efficient in protecting electrical circuits from overloads and short circuits.