The Roots EasyAir or EAX line of OEM blower packages often include a tri-lobe blower. Originally this was the RAM-X series of blowers, until 2016 when these were replaced by the TRI-RAM blower series.
The RAMX blowers featured rectangular connections that had optional bolt-on flange adapters. When the TRI-RAM series was introduced in 2016, these units also had the same rectangular connections, however in 2021 Roots redesigned the TRI-RAM blowers to have integral DIN flanges.