HP Designjet Z6100 Z6100PS 1067mm 42" Printer Spindle(Q6707A)

HP Designjet Spindle Accessories for mounting and unmounting rolls to a spindle. HP spare parts number Q6651-60048 
You can buy this as additional spindle, you have the next roll ready to load on your Printer.
Roll print for long periods without reloading paper with this spindle accessory. To quickly switch media, just preload a roll on a separate spindle.