DGA says this about the Reef: The Reef is an outstanding putter and stiff enough for short-range drives and approaches. The Reef has its roots in the APX mold which makes it consistent and slightly under stable.
About SP Line Plastic
SP Line plastic is DGA's top end professional premium blend of plastic. DGA SP Line discs will fly faster and be slightly more overstable than DGA ProLine golf discs. Prior to 2010 DGA produced SP discs on a very limited basis for specific tournaments as "Sparkle" discs. In 2010 DGA's SP Line became available to the public in a slightly modified sparkle plastic blend providing additional grip and durability.