Product description：CNC Machining Countweight shaft1.MaterialSteel,Website: , stainless steel2. TechnicsCNC machining, milling3. MOQ100 sets4. Surface TreatmentHeat treatment, oiled5. Tolerance+/- 0.02mm6. ApplicationVehicle, motor, pump7. PackageCarton, plywood8.Custom designWelcomeThe countweight shaft you see is used in health massager. It is made by 45#steel. It also can be used in other mechanical system..