The Core Standard substrate has a height of 18cm or 25cm, it is divided by the dimension 1.30 and above for easy transport, it consists of wooden boards on the surface that the mattress touches. Possibility of construction with fascia or bed. The Core Standard prices above are for a 18cm high substrate Legs: 6 -16cm Base: 18 & 25cm The substrate is lined with fabric. Required measurements : for fabric width 1.40m->2.20m for fabric width 2.80m->1.20m Fabric options