Impeller Specifications 316Lss, 316 L grade stainless steel Fabricated, MTRS included 3 blade design is standard, various angle pitches 32Ra standard finish with welds ground smooth (8, 10, 15, + 20Ra optional) After receipt of order we will confirm bore size with you to fit mixer shaft Set screw design standard for adjustable on shaft, or we can weld impeller to your mixer shaft Passivation and electropolish is optional Mixer shaft and impeller balancing is optional We do offer USP VI PTFE coatings Profilometer mapping and reports available