COBRA helical stairs Germany COBRA helical stairs Germany from Benjamin Friedl COBRA helical stairs Germany Main entrance staircase in helical shape with glass railings, custom design View Website o COBRA helical stairs Germany Main entrance staircase in helical shape with glass railings, custom design View Website Interior Design Engineering 3D Modeling Comment Share R 7 n Benjamin Friedl Designer Treppen und Glastreppen nach Maß Munich, Germany Follow Contact