Counterbalance-free fold-up door – in standard configuration featuring: 505mm-high window sections (one row of portholes on the 4th sector from bottom of door); central control unit with double wind up+wind down button and emergency mushroom button (no partial / no door lock can also be ordered as optionals); two external photocells; no safety contact strip (mandatory accessory for automatized doors); structure in galvanized steel; 680 g/m2 roll available in all colours shown in table below; manual movement rod featuring support bracket and related safety microswitch (power supply to the control unit is interrupted when the rod is lifted).