>I need human readable, waterproof, non fading, multiple copy numbers from >one to 2000+. A bar code for future use might be a nice touch too. > >Allen Here's an idea we've considered, but are not yet using.(Currently we just # with waterproof markers on the bottom chamber). Cow tags - you know the ones that hang on a chain around the cows neck, then hang them on a nail, or with a hive staple on the bottom chamber. I know you can get them as individual numbers, or a whole series of numbers, or even with letters (abcdefg...). Just an idea! Beth Nixon