This is the Atomic Aquatics Z2X Color Kit for Scuba Diving Regulators Features: Kit includes: purge cover, adjustment knob and exhaust deflector Six bright color options Atomic color kits are a great way to personalize your regulator and match the rest of your gear. Not only will you have some of the finest equipment available, you&';ll look great too! Available in your choice of: Black, Gray, Blue, Yellow, Red, Purple or Pink.