Discraft says this about the Buzzz:
Discraft Stability Rating: D-Line 0.5; X-Line 0.5; Z-Line 0.5; ESP 0.5; ESP FLX 0.5; Ti 0.5
The Buzzz? is a straight flying workhorse that you'll reach for again and again, and has quickly become one of the most popular discs of all time. Throw it hard and Buzzz? will hold any line you put it on.