Activated Alumina Desiccant is available in 1/8-inch, 3/16-inch and 1/4-inch bead sizes. We can typically ship 50 pound bags, 375 pound drums or 2,000 bulk bags of Activated Alumina the day after we receive your order. Dew points to -40°F and lower may be achieved with Activated Alumina Desiccant depending on the compressed air dryer design and operating conditions. The 1/8-inch (2-5mm) Activated Alumina bead is the size most frequently used in regenerative dryers.