For unit AQUACIAT LD2 80V (7368668): *From serial N° 712263 to serial N° 1811944 included - *Aluminium coil. If special coating please consult us For unit AQUACIAT LD2 90V (7368669): *From serial N° 712264 to serial N° 1810399 included - *Aluminium coil. If special coating please consult us For unit AQUACIAT LDC2 80V (7368794): *Aluminium coil. If special coating please consult us For unit AQUACIAT LDC2 90V (7368795): *Aluminium coil. If special coating please consult us For unit AQUACIAT LDH2 80V (7368804): *From serial N° 712258 to serial N° 1833416 included - *Aluminium coil. If special coating please consult us