The Montreal Sectional covers the airspace over the eastern US/Canada border region, including much of Maine, Vermont, New Hampshire, Northern New York State, and a sizable chunk of the Quebec province of Canada. Uses the standard 1:500,000 (6.86 nm per inch; 2.70 nm per cm) scale characteristic of sectional charts. Updated every six months. An affordable, detail-rich source of relevant FAA data that no border region pilot should ever operate without.
Needed it quick for my checkride, and they got it to me a day early. Very good service. Price not bad, either.