The Dyna-Slide will provide up to a 100:1 turndown ratio, when feeding most fine (30 mesh to sub-micron) fludizable powders and granules. In addition, it has completely variable feed rates from as low as a few grams per minute to hundreds of pounds per minute. It is ideally suited for feeding weigh scales or other process equipment, where close, high tolerance feed rates are required. Stainless steel construction and special finishes are available. http://www.dynamicair.com/products/dynaslidehp.html