These 1.83m morticed concrete posts measure 100x100mm and are suitable for closeboard fencing using arris rails and feather edge boards. And to make things even easier mortice holes have been created for you ready to insert the rails.
Post top to mortice top measurements:
When using concrete fencing posts for closeboard garden fencing you need to pay attention to the fixing of the gravel board.
For a timber board use 160 or 180mm long roofing bolts to fix timber cleats to the concrete post or for concrete gravel boards use the purpose made metal 2 pin cleat.