1st it should be addressed that there are several brands of refill kits on the market and most of these brands are extremely . . . "frail" in every aspect of the term? These other kits either come with watered down ink, are extremely messy, or cause you to do things to your cartridge that are unnecessary and may cause a leakthroughout your printer.  

For Used With 

Inkjet Printer

Volume

Color

Item No
C8727A HP DJ 3420/3325 2X20c.c  
C8728A HP DJ 3420/3325 OfficeJet 4110 3X20c.c  

51625A 

HP DJ 340/400/420C/500/
500C550C/560C 

3X20c.c

VRT40010

51626A/33A 

HP DJ 240/300/320/340/400
/420C500/500C/520/550/
560C OJ 635 

2X20c.c

VRK40611

51629A/G
waterproof

HP DJ 600/600C/660C/670C/
690C692C/694C/695C OJ725C
DJ 610C/640C/
OJ630¤§C6614A

2X20c.c

VRK40612

51649A/G 

HP DJ 600/600C/610C/660C/
670C/690C/692C/694C/695C/
640C/725C /OJ 590/630 

3X20c.c

VRT40011

51641A 

HP DJ 800C/850C/870Cxi 

3X20c.c 

VRT40012

HP51645A/G 
waterproof

HP DJ710C/720C/750C/755CM/
850C/870Cxi/880C/890C/895Cxi/
970Cxi/1120C/1200C/1600COJ/
1150/1170C/830C/930C/950C/
1220C/1125C/990C/1215C/
1218C/1175C/T45/T65/R45/R65/
G55/G85/G95/K60/
K80PhotoSmart P1000/P1100 

2X20c.c 

VRK40613

C1816A photo 

HP DJ 610C/690C/692C/
695C/630C/725C

2X20c.c 

VRT40013

C1823A/D/G
photo 

HP DJ710C/720C/750C/755CM/
810C/880C/890C/895Cxi/1120C/
1200C/1600C OJ 1170C/1175/830C/
1125C OJ R45/R65/PSC500

3X20c.c 

VRT40014
C6615D/G HP DJ840C/ OJPSC500 2X20c.c VRK40613
C6578D/G HP DJ950C/930C/1220C/990C
/1215C/1218COJ1175C/T45/T65
/G55/G85/95/K60/K80  C1823		 3X20c.c VRT40014
C6625D/G HP DJ840C 3X20c.c VRT40014