Ink Cartridge Clamp Pumping refill tool for HP 21,22 60 61 56 57 74 75 901 121 300 PG40 for Lexmark 26 16 It can be used to clear the nozzle and pump the air. Suitable for HP, Canon, Lexmark, CISS Fitting DIY. This is larger size refill tool for Ink cartridge model list as bleow: (Just for reference) : For HP 21, 22, 27, 28, 56, 57, 60, 61, 74, 75, 92, 93, 94, 96, 100, 121, 122, 300, 301,702, 703, 816, 817, 818, 802, 860, 861, 901 For Canon PG-40 /50 / 830 / 440/540 CL-41 / 51 / 831 / 441/ For Lexmark 26 16 / 27 17