Benjamin Hand Pump Desiccant Kit The Benjamin Hand Pump Desiccant Kit is for the Benjamin hand pump. The desiccant kit removes the moisture out of the air. This is important because the Benjamin rifle will rust on the inside if it is filled with a hand pump without a desiccant kit installed. The desiccant kit is filled with a substance that absorbs moisture and will turn pink or blue when full of water. When that happens, just pop off the cap of the desiccant kit and put the beads in the oven for an hour or until the beads return back to the normal white/clear color. Includes: Desiccant kit Two Silica Packets