The impeller under consideration is a rotor wheel of a centrifugal compressor. made of 17-4PH martensitic precipitated hardening stainless steel. Its total operating lifetime was estimated to 80. 000 h. https://www.lightemupsequences.com/quick-sale-2-5-Inch-By-10-Yard-Soft-Pink-And-Red-Damask-Dupioni-With-Red-Tinsel-Edge-Ribbon-super-value/