I just got mine tested on an RDC machine. Details (incl. non RDC related specs) ProStaff 6.0 85 China edition (earlier make) Weight - 361 grams (racquet + 2 layers of 4" x 1/4" cm lead @ 3 and 9 + head's head tape + pacific force 18) Stiffness - 68 SW - 342 Without the leadtape and headtape the racquet was a serving monster but my groundstrokes were only so-so. But with their addition its now very stable and quite powerful on groundstrokes but only so-so on serves (especially second). It is still the lowest powered racquet I have used. Still looking around to find that right balance for optimal serves/groundstrokes.