... Replacement 1:1 4.Guarantee 12 months 1055 CISS, Continuous Ink Supply System for HP1050/1055 CommodityFor HP Designjet 500/800 CISSSuitable ... High quality, High Efficient, Mutual Respect, Mutual Benefit, Never-ending Service 1. Toner cartridge, we use high quality OPC, Blades, PCR ... you down or feel unhappy. 4. Long-term technical support, service never ends, we work till you are satisfactory & happy ...