Brand New HP Genuine Authentic Part
"Maintenance Kit #2" 
Designjet T1100, Designjet T610 
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If your plotter is getting this message 75.21:10 in the control panel (Maintenance Kit 2 will soon be needed. 
Or an Error code of 21:13 in the control panel.
This is the part your need to order to have your tech to come in to service your plotter.
 
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