This is a case for the "0.96" I2C IIC SPI Serial 128X64 White OLED LCD LED Display Module".
You can get the display on Adafruit or ebay just put in
...Plus the description above. There is another OLCD display that is color that will NOT fit in this case.
The case has a back but there is no way to attach it you will have to use tape or glue.