About 38 A0 sheets (841 x 1189 mm) or 76 A1 sheets printed sideways from a 45.72 m roll, before allowing for trimming and test prints. A box holds four rolls, so one box gives roughly 150 A0 or 300 A1 drawings.

Yes. The roll has a standard 2-inch core, which loads on the spindle of HP DesignJet, Canon imagePROGRAF TM and Epson SureColor T plotters 36 inches (914 mm) wide or more. At 841 mm wide it is narrower than the 914 mm maximum, so it sits within the paper guides.

Yes. An A1 sheet turned sideways is 841 mm wide, so it fills the roll width with no waste. Most plotter drivers and HP Click rotate A1 drawings automatically, so one A0 roll covers both sizes.

Keep rolls in their wrapping and box until you use them, in a cool, dry room away from sunlight and air-conditioner drips. Humidity makes paper curl, which causes jams and smudged lines, so wrap part-used rolls again after use and use older stock first.