This is Cherry profile, thick PBT dyesublimated. It have the sharp corners, like Cherry profile do.
1.75 B profile row is unpossible right now, it doesn't exist yet at the factory. No further key will be add. Buy key individual is not possible now either.
These set will fit any standard ANSI 61/87/101/104 keyboard 100% like Cherry G80-1000/3000, Filco MJ1/2, Ducky all ANSI MX model, Poker, Leopold 200/500/700 series, CM Rapid and XT, Rosewill most model, KUL, etc... and will fit all except the spacebars on many other board such as Corsair, CM TK, iOne.