Everything from small to large business jets.
CJ2 till Citation X.
Different makes & models but kinda that size.
All 135 ops.
Can't bid mainline.
They have a 'garanteed' interview kinda deal with Delta Mainline.
They travel you positive space tickets to where the airplane is.
Same travel perks as Mainline.
I don't work there so you'll have to dig for yourself for the rest of the info.