1. Small telescope design, portable to carry; 2. Six different capacity for adjust freely. With spring loaded ash ejector. Gear shifting to adjust tube capacity, conpress greens, drop easily. 3. Easy to fill; 4. With glass tube filter piece, more smooth. 5. All components are detachable, easy to clean and disassemble/assemble. 6. Aluminum shell, high quality and safe for using. 7. Replaceable quartz tube with simple plug in/out, no thread. You can either clean or replace a new one.