These particular models have a bracket for just a blower, but no blower shroud.  Also ordered among the list of shrouds Using the 60mm fan adapter, it seems like it can be shorter compared to the bracket plus blower.  The server board (Supermicro MBD-X9DR3 with 2x E2680V2 CPUs, EEB type factor) I wish to use this with is in a huge EEB sort issue