Schroder 2 Arm.....High, Med. or Low Mass?

I need a Tonearm & I am looking at the Schroder 2
with the Pertinex wand.
It looks like It is about a 9 inch Arm.

I would really like to know what the Mass is.
I have read that my cartridge ( Musicmaker III ) matches
best with a LOW mass Arm.

Anybody have a clue?
Effective mass is 12g and is a very good choice!
Mass range is extendable with optional brass cartridge carrier. It adds 5 grams to effective mass.