:bananen_smilies104:You don't need to cast a bullet blank if you aren't into casting yet. Buy a snakeskin pen remnant package from " BudCamp.com ". It will have many different snakeskins of the corrent thickness for pen kits. Last box I received had over a dozen different colored Cobras, several different Rattle Snakes, Several Pythons, Boas, a couple Anacondas, some Lizards, Orsteridge, and Gaters. You can glue them directly to the tubes and build up a CA finish, or cast them yourself. You can look at my photos under plantman to see some pens, or look in the liabary under casting for my information on how to make your own resin savings molds for any pen, cheep and easy. Most of the snake blanks out there are prairie rattle snakes. There are several other articles by our members on how to cast snake skins in the liabary. Bud has Easter and Diamond Backs as well as Prairie. Good Hunting Jim S