Von Duprin KR (key removable) mullions requires a 1-1/8" or 1-1/4" mortise cylinder with the standard straight cam, the cam is not inverted. Please see chart below for part numbers.
4754, 4854 and the 9854 are electrified mullions and handed as noted below:
4754 is not handed:
Prepared for two 4263 monitor strikes.
Use with all Von Duprin rim panic devices
4854 is han...