Welcoome to the forum
They are standed SquareD QO type. (standard width)
SquareD is not the only one who make ones that will fit.
I personally like SquareD as I'm a retired Journey level Electrician by trade.
a single pole 15 amp single pole would be a QO-115
a single pole 20 amp single pole would be a QO-120
See picture what they look like in the back.
2012 Georgetown XL 378TS
FB Georgetown RV Club