Welcome to the home of Model Plane Foam!
Model Plane Foam (MPF) is currently available in two grades: A and B. Grade A has the original smooth surface. Grade B is chemically identical to Grade A but has a rougher surface texture. While Grade A is usable for both profile and shaped planes, requiring no surface preparation, Grade B may require extra finishing for a smooth surface and is more suited for shaped planes where the fuse and wings are contoured and finished and for internal structure where smooth surface isn't required. In response to customer requests, we have 8 sheet packs for both A and B grades, as well as a mixed pack with 8 grade A and 8 Grade B for Domestic and Canadian customers. Details are on the foam page.
1-25-17 update: US Postal Service has increased their rates, for more info click the rate comment in the Foam Page