Model 100 - printing is parallel to the cylinder axis (straight), the unit is clamped directly onto a dovetail mounting ring. They come in any print circumferences to suit any press.

Model 200 - printing is at right angles to the cylinder axis(convex), the unit is clamped directly onto a dovetail mounting ring. They come in any print circumferences to suit any press.

Model 300 - printing can be parallel (straight), or Model 303 for printing at right angles (convex), to the cylinder axis. The unit is clamped directly onto a dovetail-mounting ring via an appropriate adaptor to suit straight or convex numbering. There are different adaptors for the different print circumferences.