This is a used C8 HiPo 289 special K code balancer that I purchased new from Ford, circa 1982. It probable has less than 6000 miles on it. The rubber is cracked on the back side and appears to be just the outer edge. The sealing surface looks great. I took this off a my running motor. I have no reason to believe it would not work fine on any other motor. Please see pictures and ask questions. Asking $200 OBO. Thanks Cory