Mechanical agitation shown with two stainless 2 wide x 5 inch long paddles, 3/4 inch stainless shaft, bronze bearing holders with graphite packing on pulley end, keeps materials from setting as long as paddles are turning, bearings are held in a stainless 4 bolt double plate adaptor. Work well for most materials that need to held in suspension or mixed. Call Aceco 1 (602) 589-5419 or 1 (602) 390-3908 for more information.