Dx4 solvent based printhead can be used in the following printers:

Roland Soljet SJ-540, SJ-740
Roland SP300v, SP540v
Roland SP300, SP540 (early non V models)
Roland FJ-540, FJ-740
Roland SC-545EX,
Roland SJ-645ex SJ-745ex SJ-1000ex SJ-1045
Roland XC-540

Mutoh Rockhopper II
Mutoh Falcon Outdoor II
Mutoh RJ-8000

Mimaki JV3 Series
(JV3-130, JV3-130sp, JV3-160, JV3-160sp, JV3-250, JV3-250sp etc.)
Mimaki JV4 Series

Made in Japan