These cubes have all the normal calibration features. All cubes measure 25mm on each side.
Thin wall (.4mm wall) (TW)
Bridging (.4mm full shell including top and bottom) (BRG)
Solid (for testing infill) (SLD)
There are MANY forums on the topic of calibration. I needed a model that had the walls specifically built for my extruder nozzle (.4mm hexagonal).