To use with 20 or 30 plate wire racks
Enables users to colour code individual stacks of Petri dishes. A coloured tag can be attached to the 20 or 30 plate Petri dish wire racks. These reusable tags are manufactured from polypropylene and notes can be written on them using either water soluable or permanent markers. Each set comprises 20 each of yellow, blue, red, green, white, orange and grey tags.