A passage knobset is a type of door handle that is typically used on interior doors that do not require a lock. Some specifications for a passage knobset with a 60/70mm backset and a polished brass finish are:
Material: Brass
Finish: Polished brass, which provides a traditional and classic look
Backset: 60/70mm, which refers to the distance from the edge of the door to the center of the knob
Door thickness: Suitable for doors with a thickness of 35mm to 45mm