These are default hard wired parameters that are needed for the object.
You cannot delete them and you should not either.
For example, the A, B and ZZYZX parameter are displayed and can be in the Settings Dialog's Length, Width and Height fields.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac27