here's what I found on the subject:
Roland Soljet PRO II Sj-540 Printer And Plotter
Certification: ISO7779 Printing Technology 6-color, Piezo inkjet method
Print Resolution 450 x 360-360 x 720-720 x 720-720 x 1440-1440 x 1440 dpi selectable
Printing Width 8-5 / 16 inc to 53 9 / 16 inc (210 to 1361 mm) 8-5 / 16inc to 73 9 / 16 inc (210 to 1869 mm)
Feed Distance Accuracy Uncorrected: 0. 3 mm printed length, whichever is greater using Roland PET-G film, print travel distance is 1m
Conditions for Usable Materials Maximum printable material thickness including base paper: 0. 039 in. (1. 0 mm)
Maximum diameter for roll material: 7-1 / 16 in. (180 mm)
Core inner diameter for roll material: 2 in. Or 3 in. (50. 8mm or 76. 2 mm)