You will receive one Zombie Viper and one Zombie Cobra Soldier head.  Each is cast in resin.  These were cast from professionally sculpted heads done by the renowned action figure sculptor Krexx.  You can see the original sculptings in the main pic.  The originals are included to show the level of detail.  You will be receiving one each of the off-white resin castings, and not the original sculptings.  These casts are ready to be painted and mounted on your production figures.  You may need to modify the neck ball on the Viper slightly to fit the torso of your choice.  Also note that the Zombie Viper is based on an unproduced concept sketched by Hasbro GI Joe team member Kurt Groen around 1990.  This concept appears to be an early idea that led to Toxo Zombie, and is shown on the A Real American Book website.  Buyer pays $4 for shipping, US shipping only, including the Global Shipping Program.  Check out my other auctions to save on shipping. 
Also, if you're looking to connect with other o-ring customizers, be sure to check out the O-Ring Warriors Nation on Facebook.
Thanks!