Discraft have been in the business of manufacturing discs for 35 years. Unlike most of the other manufacturers they like to keep it simple and use a single number system to describe their disc flight characteristics. The numbers indicate disc stability and range from -1 (most understable) to +3 (most overstable). Their most famous and bestselling disc is the Buzzz - a fantastic, super straight flying mid range. 

Discraft plastic information here