Tussle with the copper cobra. The Flex Mullet "Cobra de Cobre" is lethal, but like a snake charmer, the reds can't resist tempting fate. Eventually they'll (you'll) get bit using this classic color variant. The Flex Mullet "Cobra de Cobre" is our take on new penny, but with a lot more venom, because who carries pennies anyway. Carry a cobra instead!