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