These odyssey SAE terminal adapter kits allow you to hook up your positive and negative battery cables to your odyssey battery. They include two different sized posts and are tapered. The larger positive post is 0.750 in. At the base and tapers to 0.690 in. At the top. The smaller negative post is 0.690 in. At the base and tapers to 0.625 in. At the top. The odyssey SAE terminal adapter kits are designed to fit odyssey and other batteries with 6mm x 1.0 female terminal post threads.