This is a turbine blade, common to the CFM56 5B/7B engines installed on the Airbus A320 and Boeing 737NG. The CFM56 high-pressure turbine has only one stage. This is the turbine blade that first encounters the combustion gas from the combustion chamber. (Because there is only one stage, the CFM56 uses the term "high-pressure turbine" in official documents such as manuals. Unlike other engines, it does not use the term "single-stage high-pressure turbine.") The CFM56-5B was installed on the Airbus A320-214 (new type), and the CFM56-7B was installed on the Boeing 737NG (-600, -700, -800, -900). In Japan, the -5B has been used on A320s of Peach and Star Flyer, and the -7B has been used on 737NGs of ANA, JAL, Solaseed Air, etc. This is the same engine part as the goods of a certain airline, but it is not known if it is the same version of the blade. As a result of a simple analysis of the material, it is strongly suggested that it is a single-crystal alloy ReneN515. This blade is believed to be a single-crystal blade. (CFM56 turbine blades are not necessarily single-crystal. Especially, without the engine derivative or alloy name, how was it confirmed??) The item for sale was removed from an engine actually installed on an aircraft. It is in the condition it was removed, so it has the dirt that occurs inside the engine. You can see how the cooling air flows through the film cooling by the way the dirt flows. I also have items for sale with the ceramic coating removed. I also have other aircraft parts for sale, so I would be grateful if you would take a look. https://jp.mercari.com/user/profile/457637762 * Used, so there is dirt and damage. * Not a merchandise item, and there is no packaging. * I will use a reused bubble wrap envelope as cushioning material. (Because it is ideal for protecting the blade) * It will take up to a week to ship. * Shipping within Japan only. Please consult about shipping costs for remote islands.