1. Overall material: aluminum alloy + stainless steel 2. Pressure: constant 30 pounds pressure 3. Style: flat bottom/threaded bottom 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 when making coffee 7. Size: 51,mm, 53mm, 58mm
