The legendary Moog transistor ladder filter for AE modular!
The circuitry of this filter is the core of the earliest modular synthesizers created by Bod Moog; known for its distinct, unique sound.
Technically, it's a 24dB/octave lowpass filter; but this version additionally offers outputs for taps of each filter stage, offering 18dB, 12dB and 6dB/octave, each with its own sonic qualities.
https://www.tangiblewaves.com/store/p231/BOB_FILTER_904A.html
These merchants probably sell this module. Huh?