Identify this brake master cylinder

[E30stan]

so im planning to upgrade the brake master cylinder to the 25mm version i see being talked about to compliment the e36 m3 brakes i installed on all four corners.
this is the brake master cylinder i received today.



looks like its the wrong part, no?

[MR 325]

Looks like you may have a E32 735i master cylinder there. It will only work with the 325iX or E32 735i booster.