InkTec Refill Kit for HP 21/27/56 Inkjet Cartridges
The InkTec refill kit for HP 21, 27, 56 inkjet cartridges is a do it yourself kit specifically used for refilling empty HP 21, 27, and 56 inkjet cartridges up to 4 times.  The kit includes two 20 ml bottles of ink specially forumlated for the HP 21, 27, and 56, and also tools and instructions to refill the empty ink cartridges.  These kits provide great value and are ideal for extending the life of recently empty cartridges.