I pulled these ram sticks from my old 486, and they are 1MB sticks. However, I am not sure if these are non-composite ram sticks. They will be going into my Macintosh Plus to upgrade it to 4MB. All I know is that these have Samsung memory chips and are from about 1992/93 (very odd coincidence, the pictures attached are numbered 92 and 93). The Macintosh Plus will boot with them; however, I am unsure if it will lead to problems.