Module Cover with No Cutout, C Series Module Shell—The cRIO‑9958 contains 100 module covers and offers OEMs and system integrators a cost-effective solution for developing custom CompactRIO I/O modules. The cRIO‑9958 is not a full sleeve for the CompactRIO module; it only includes the metal cover on the outside part of the enclosure. The cRIO-9958 module covers do not have cutouts for connectors, so you can choose the connectivity of your custom module.