The set has 6 colors:
Pink
Red
Green
Blue
Yellow
Gold
and a blender/color remover pen.
 

BPI# 42501

For polycarbonate lenses.

Kit of seven pens

 Quickly remove the marks from a progressive lens! The fiber tip incorporates a valve that shuts off flow of the liquid when not in use. Just press the tip to open the valve, when the tip is moist, draw over the marks. Wait a few seconds and wipe clean!

The new pastel edge tints for rimless lenses. Easy to use, just color around the edge of the lens.
The colors can be blended and overlaid to create special effects and have been specially formulated for all types of plastic lenses.

Lens mark all lenses including A/R and hydrophobic.
Works on CR39, High Index, Polycarbonate and Polarized lenses.
BPI ® introduces a new lens marker, BPI® Mark It!™, in its own dispenser pen. The handy 15 ml pen allows the marker to be used in confined spaces. For example, it may be used to mark lenses while their marks are being read in a BPI® ID Tech™.
The solution is not water based, so it will mark regular plastic lenses as well as A/R or hydrophobic lenses. The highly visible orange mark dries in minutes and may be removed using BPI® Mark Off Plus™.