1. Material: aluminum alloy + 304 stainless steel 2. Pressure: constant 30 pounds 3. Style: flat base/threaded base 4. Sturdy and durable material, not easy to corrode and rust 5. Ergonomically designed handle for comfortable grip 6. 30-pound spring ensures constant pressure and saves time in making coffee 7. Size: 51,mm, 53mm, 58mm
