Oak70 is the spiral staircase with steps made in oak . The handrail is in PVC with an aluminium core in white to match the painted steel balusters. The spiral staircase Oak70 is characterised by a landing which can be adapted during installation and can have three different configurations (trapezoidal, triangular or circular) so that the staircase can be installed in openings of various shapes. The direction of rotation, clockwise or anticlockwise, is decided at the time of installation. The diameters are 110, 130 and 150 cm. The supplementary balustrade allows protecting the opening on the upper floor.