Spirit River will use these markers on thier Lite-Brite, Mighty Minnows and Polar Aire minnows. These markers will not bleed. They also have several other advantages over others: 1) They have polyester fiber tips (not nylon) 2)They are accurately labeled and color-coded caps and sides for easy identification of colors 3)The caps to these markers are straight fitting and airtight Vendor: Spirit River