These printers use the M3240 cartridge:

Calcomp TechJet 720 C Model 5636

Calcomp TechJet Designer 5624

Calcomp TechJet Designer 5636

Canon B 160

Canon CFX B-380

Canon EB 10 BubbleJet Fax

Canon Fax B-650

Canon Fax Eb-10

Canon Fax Eb-15

Canon FaxPhone B-650

Canon ImageMaker MPC 20

Canon ImageMaker MPC 30

Canon ImageMaker MPC 70

Canon ImageMaker MPC 75

Canon MultiPass C-635

Canon SR 850 E

Selex SR 850 D-E

Tally-Genicom Mannesmann Tally T-7070