Specification - The air dryer can be repeatedly used after heated in a microwave or an oven. - Air filters at inlets are included. - Length: 290mm - Outer Diameter:50mm - Net Weight:0.43kg - Air Inlet/Outlet: Open Product Details Silica air dryer for ozone generator has the following characteristics: 1. The air dryer can be repeatedly used after heated in a microwave or an oven. 2. Air filters at inlets are included. 3. Dark blue silica beads turn to a pink color when filled with moisture.