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About product and suppliers:
        Alibaba.com offers 3,047 21 cartridge products. About 11% of these are toner cartridges, 9% are ink cartridges, and 1% are other consumer electronics. 

A wide variety of 21 cartridge options are available to you, such as toner cartridge, ink cartridge. You can also choose from hp, panasonic, and epson. As well as from re-manufactured, compatible, and original. And whether 21 cartridge is yes, or no. 

There are 3,084 21 cartridge suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Macau, which supply 97%, 1%, and 1% of 21 cartridge respectively. 

1 cartridge products are most popular in Domestic Market, Southeast Asia, and North America. 

You can ensure product safety by selecting from certified suppliers, including 1,023 with ISO9001, 877 with Other, and 274 with ISO14001 certification.