Orion Flourescein Dye Marker This marker uses a green flourescein dye to create highly visible florescent green signals. This special dye can be used to write on the ground or snow and is perfect for signalling rescuers to your location. This kit comes with 2 markers that are able to cover up to 50 square feet each. California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Product MPN 984 Product UPC 077403081622 Fast Ship In Stock Ships Today