Product item: 4-Pack Compatible (4x Large Black) PGI220 PGI-220 Ink Cartridge Used for Canon PIXMA IP3600 IP4600 IP4700 MX860 MX870 Printer 100% Compatible with following printers: PIXMA IP3600 IP4600 IP4700 MX860 MX870 Package Included: 4-Pack PGI-220BK PGI-220 Ink Cartridge (4x Large Black) Page Yield: Up to 490 Pages per Large Black PGI-220 Ink Cartridge, at 5% coverage on A4 paper. Installation guide: Step 1: Shake the cartridge from side to side 6-8 times to make toner distribute evenly. Step 2: Remove the orange cap then put them into the printer. 1. Product under ISO9001, ISO14001 standard 2. limited warranty After-sales Service: 1. Log in Your Amazon Account > Click Your Account > Your Order > Find your order and click ‘Contact Seller’. 2. Go to the product page and click the seller's name ‘Sold by’, Click ‘Ask a question’ button.