The pens I used in my Stillman and Birn Zeta. Notice my nice yellow pencil from Cheap Joes. I got it when I took a class there or was it in an order from there? Joe always includes a little giftie with your orders. The sweetest mentally challenged young man packs all the gifties. His only job and he loves doing it. If you take a class at Cheap Joes you get to tour the warehouse where Joe introduced us to this special young man.