Profiling machine blades come in one size only and fit the RDG USA Oboe/EH Profiling Machine. For the Resharpening Service, we will exchange your used blade for a newly resharpened one. We will send you a newly resharpened blade immediately upon receipt of your used blade and payment. If you prefer to keep your original blade, please specifically request so, and allow 3-5 weeks for us to resharpen it and return it to you. Since this is a labor service there is no tax.