Ikea Tromsö ziptie Wall clamp

1. place this on the pipe. slide zip tie around it so that the lock is hidden inside clamp. 
2. tighten the zip tie and cut the leftovers. 
3. rotate piece against the wall
4. repeat with all clamps
5. screw it down (holes sized to the wurth wg-fix)
6. shake the furniture
7. change the screws to dry wall anchors if the screws fails to stay on the wall. Now you have pilot holes from the screws to drill holes for anchors. 

Edit. Added longer piece with 21.8mm from the wall