This is the cover for the Enterprise 128 Premium SD Card Reader unit. The premium has different dimensions from the first version (see my other SD card reader case design), so a new case is needed. The design is based on the previous design even it is a bit larger because of the bigger PCB. The card reader anyway is same as the first version The unit can be plugged into the socket of the BASIC module, and replaces BASIC ROM and adds two SD card socket to the system, mapped to disk drives. The cover made of top and bottom cover halves and must be screwed together using three pieces of 3mm diameter 15-16mm long countersunk self tapping screw.