I built and use an Anet 3D printer. After much use the heating element would not keep temperature and I needed to replace heating element. This kit I bought later and would be quicker repair to swap in good assembly. The option to replace the assembly like this would reduce down time of 3D printer. You optionally can choose to disable failed part at your leisure.
OK
Not yet tested but arrived in good condition and very well packaged. Thankyou to Seller :-)