Talon Tunes sells Inocom tanks that originate in Korea. They are rated for 250 bar (3626 psi). I think the OP is referring to a TT .58L (580cc) tank, not .53L. The Chinese tanks have a thicker aluminum core and are rated for 300 bar (4350 psi) and the neck is slightly thicker. The .58L Talon Tunes tank is slightly longer than the .5L (500cc) Chinese tank. I have both in my arsenal as well as a 480cc TT tank and a 350cc Chinese (Acecare) tank.