The COLOP B6K Digit Auto Number 5.5Mm COLOP Reiner B6 6 wheel auto numberer. prints from 0 up to 999999. It features a selectable consecutive 6x, 12x and 20x number advance mechanism with 5.5mm figure size. Also included is a non-print leading zero facility. The COLOP B6/8K Digit Auto Number is a self-inking stamp with Type 2 pre-inked pad