PVC stair nosing profiles Protect 156 play an important role in protecting the edge of tiled, marble, wood, carpeted or other kinds of steps, and are placed during the laying process to make sure they are set into the step covering. Available in black, grey and brown, these profiles offer a solution that meets a number of different requirements. Protect 156 profiles come in different formats and dimensions to assure they can be adapted to different sizes and types of coverings..