... tank specifiations include :1.1-core,3-core,5-core,7-core,9-core,11-core,13-core,15-core. 2. Folded filter core length has 10 inches,20 ... .1um0.22um0.45um1um3um5um10um.4. Choosing hydrophobic filter core (fit for gas)or hydrophilic filter core(fit for liquid) according to different requirements. Stainlees Steel ...