You can always find a reason to re-invent a standard pen and this is what Pentel did with their EnerGel pens. These are the limited edition Pentel Cat Pens. The first ad I saw was for five pens but I ended up with six. Starting left to right we have the American Short Hair, the Abyssinian, the Red Tabby, the Bicolor Cat, the Siamese and last the Tortie and White. I like cats so I picked up all of them. Add all these cat pens to your collection.