Features: Make from 304 stainless steels materials, with fine texture, light weight and long terms use. This refillable air canister is designs for repeated use, making it convenient for storage and transport. Great for outdoor picnics, camping, hiking trip, backpacking trip, fishing trip, barbecues parties or driving tours where portable stove is need. It needs to used with a double inflation line, which can achieve inflation and pressure relief, never leaks. 2.2L can hold 1200g of liquefied gas, 3L can hold 1600g of liquefied gas,4L can hold 1700g of liquefied gas, Specifications: Bottle size: 2.2L size: about 160x160mm/6.3x6.3inch/ 3L size: about 163x193mm/6.42x7.6nch 4L size: about 163x245mm/6.42x9.65inch Package Includes: Stainless steel gas tanks x1pc Gate x1pc note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!