The straight style staircase handrail fits with the Standard Flange and is a good solution.
The images show the difference between the candy cane and the straight.
The junction of the handrail with the vertical post is made with a Standard Alvin Clamp no AIS-44-8, so it can also be used for other purposes.
The flange can be screwed to regular Hexagrip Staircase or to the Fixed Adjustable Aluminium Staircase
It can also be used for other types of staircases. Vertical pipes can always be cut to a shorter length. You can also change for another 1.900'' pipe if needed.