. stairs : floated, suspended / straight, quarter or half turn
. frame : one lateral beam in steel to embed or to fix on a solid wall
. steps : glass (with rgb led option for lighting steps) / wood (oak, beech or other on demand) / stainless steel / lacquered steel
. railing : glass (independant piece) / glass and stainless steel / stainless steel /  glass and lacquered steel / lacquered steel