Welcome to the Ricoh DX-4640PD product page. Here you can find information and pricing for your Ricoh 893510 Genuine Ricoh Inks, Box of 6, Type-DX4640, Black . Easy online ordering of your 893516 (DX4640L) Genuine Ricoh Masters, RIC893516, RIC893510, can be completed from this page. Tonerprice.com backs all of our cartridges with our exclusive warranty. As always, we provide free ground shipping on orders over $75 within the contiguous United States from 5 warehouses nationwide.