Product Description: Black Printer Cartridge for HP Inkjet DJ3930 & HP Inkjet 3940
Amazon.com: Give your black-and-white documents a polished, professional look. The HP 21 cartridge is perfect for low-volume users who want laser-quality text and graphics. Features include:
Print professional-looking documents with laser-quality black text.
Reliable—print crisp text every time with your HP printer.
Simple to install and easy to use.
Initial HP printer compatibility:
HP Deskjet 3910
HP Deskjet 3930
HP Deskjet 3940
HP Printer/Scanner/Copier 1410
What's in the Box One HP 21 Black Inkjet Print Cartridge
Customer Reviews
Average Rating:
Rating: - review
As usual, the HP Printer ink I ordered arrived in a timely fashion, and was exactly what I expected.....It is a quality ink, and I can rely on it..Dr. J....
Rating: - HP 21 Black injet cartridge
I wasn't really that impressed with this item. The cartridge ran out of ink within a couple of weeks and I don't do that much printing.
Rating: - about time
I didn't think I was ever going to get this. Next time I'll go to Wal-mart.......
Rating: - HP does great
I have been sold on the Amazon system for getting my printer supplies. I consistently get a low price, free shipping and keep the office running. Living overseas and finding excellent supplies quickly can be a challenge. Amazon and HP do us well.
Rating: - extremely happy!
I chose to buy this item in conjunction with two others, on a hunch. The waiting for arrival was short, but seemingly long, only to me. I was anxious to try it out because an ex-employer swears by the equipment in his office. Now I can see why, its easy to maintain, reasonably priced, and easy to find. I would definitely recommend this product to all with a five star rating. I am 100% satisfied with my purchase.
- 
- 