Welcome to the Gestetner CS-231 product page. Here you can find information and pricing for your Gestetner 887933 (Type K1) Genuine Gestetner Toner Cartridge. Easy online ordering of your 887914 (Type K1) Genuine Gestetner Toner Cartridge, 85424, 85421, 85418, 85419, 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.