I have 3 Prince Experimental (Tour NXG Graphite) Rackets with 4 3/8 grips size. They are the oversize version. They are used and in pretty good shape. They do have scratch marks on them from normal wear and tear of playing. They are the black rackets that say "Experimental" on the side, but I believe these are the ones that were used by the pros when Prince was doing testing with rackets and eventually released the Tour NXG Graphite series. Please email me if you are interested. I can send you pictures. Tom (email@example.com). I paid $150/each for them, but now that I have wrist problems, so I am no longer playing tennis. Just email me and make an offer.