Pulled from a working system with 3 available. Also compatible with 2006 and 2007 models of Mac Pro [1,1 & 2,1] however may run at a lower speed of 667mhz. 

These modules follow the Apple standard for 800mhz RAM with large heatsinks. An ideal upgrade for an old system that is still very usable.

There was one module from the system that I was unable to demonstrate as working so this is listed separately as spairs & repairs.

Full details below (copied from a google search of the SKU code & edited for condition and quantity):