... , Authentic reputation (impeller, stirrer, rabbler, beater, propeller, mixing blade, paddle, mixing arm)The axial flow paddles have large onflow ... and oxygen dissolving of biology ferment. Dimensions of Four-Blade PropellersDJdd2hB1B2h1d1d0δ(kg) WeightKSXZSX200254040804010M6-32.4041.842220304540884410M6-33.7762.7842503555601005010M8- ... is the same as the inner hole. Four blade high efficiency impeller