Q21515CTNC, 15 Amp, Quad, Push-in circuit breaker, 120/240V, 10kAIC @ 120/240V, Siemens, type QT.  Requires two 1" spaces.  2 x 1 Pole 15A and 1 x 2 Pole 15A.  Factory new.

(1P 15A) - (2P 15A) - (1P 15A)