Due to its laths which are made of crystal clear acrylic glass, the door leaf of the EFA-STT® is transparent at more than 70% - this fact makes it a worldwide unique high-speed door: robust but nevertheless completely transparent.Advantages which are transparent to everyoneAt all passageways in company which are passed through from two directions, the clear view through the door offers decisive advantages: Accidents are prevented and smooth transport operations are guaranteed.The door leaf of the EFA-STT® is kept in a certain distance in the spiral. Thanks to contact-less winding-up, the transparent laths offer a good view through the door for many years - and with hardly any wear. Therefore, the whole door convinces with a perfect look, even under hard everyday working conditions.