This tangential flow impeller is effective for low speed, high viscosity mixing. The 5 x 5 in (127 mm x 127 mm) anchor blade is welded to a ⅜ in (9.5 mm) diameter shaft, all electropolished 316L stainless steel. Sometimes referred to as a “sweep”, the high shear at the edges makes it a good choice to use close to the vessel wall.