3M DBI-SALA 2103189 Fisk Descender and Vhs Instructional Video DVD, Silver Descent control device for suspended work activities Manually controlled descent 19 in (48 cm) gentle flow configuration Order 1205000 kernmantle rope separately - last three digits detail length Stainless steel one-piece manual rope descent device Fisk Descender is the simplest, most effective descent control system ever designed-it's easy to trust a system designed for durability, thermal capacity and smooth flow Gentle flow 19-Inch of working line to pass through the descender Large radius for smoother descent Less wear to the working line Reduction in rope hockling and torsional twist