The links for both items work if they are cut and pasted, but not if they are just clicked on since for some reason the highlighting on this forum cuts off the URLs.

The possibility of the "kit" being (4) 4MB SIMMs makes sense, except that the listed weight for both items is identical at "0.04." Perhaps they mean weight per SIMM in the case of a four SIMM kit, though usually it's listed for shipping. I suspect though that you're probably correct.