Bohning's Ice Fishing Tip Up Flag Replacements are made of durable and high visibility materials. Vivid colors ensure maximum reflectivity and superior daytime color. Each package comes with enough material to complete 2 Tip Up Flag Replacements. You can add your name to them with a permanent market to ensure you are within local regulations and don't lose your tip ups. These flags are 6 times brighter than conventional marking and are durable and non-corroding. Lastly, they are very easy to apply.