High frequency welded fin tube, crimped fin tube, serrated fin tube Fin material: Carbon steel Q235, SPCC,08FeAl,TP304, TP316,TP409 etc, fin type: welded, L Fin thickness:0.3mm~3mm, Base tube material: SA179, SA106B,SA192, SA53,SA334, SA335, SS304,SS316L, etc. Application: *Air water cooler unit *Product coolers - gas, chemicals, petrochemicals, oil etc. *Heat exchangers *Air conditoner *Air condenser * Boiler..... High-efficiency fins for higher temperature applications giving complete and permanent atmospheric corrosion protection of the base tube.