4x Oki 710 43913801,  43913802, 43913803, and   43913804 Image Drum Counter Reset Code Fuses. 4 fuses total allows you to reset each of the color imaging drums (so that printer thinks it's new).  Most Drums can be used up to two times before needing replaced, though what you look for is a degradation in quality instead of just replacing because of a used and fixed counter.  This reset treats the image drum as if it were newly installed at least in pages counted, mechanical wear will still be present however on the older drum.

E-Z instructions provides as link upon request included with this purchase, no soldering required.  As easy as stick and peel solution without the extra cost.