Siemens Q21515CT2 Two 15-Amp with Two pole Standard BreakersSiemens space saving, plug in circuit breakers are intended for use in Siemens EQ, Siemens Ultimate, ITE, and Gould load centers and meter combinations that are rated to accept type QT breakers. Check wiring diagram to confirm. To ensure the warranty on a Siemens panel is not voided, the use of Siemens breakers is required. The quadplex breakers provide two double pole breakers in half the space of standard sized breakers. These triplex, 1 2 Inch