5PCS/Lot POSCA 3M Queen Marker Pen Non-toxic for Beekeeping Queen Rearing Size: 130mm Model: PC-3M Features: These are uni POSCA water based, non toxic, non fade and quick drying marker pens Perfect for marking your new queen for simple detection, it additionally determines how old your queen is by the color Queens are universally recognized as having the colour in line with year dotted on the top of her back It is straightforward to apply, yet you could catch your queen and preserve her nonetheless These pens won't dry out, and feature a built in agitator to combine the paint ahead of use Color: Blue, White, Red, Green, Yellow Packaging included: 5PCS×Marker Pen