Head Graphene XT Instinct Rev Pro 16x16 Tennis Racquet - 4 3/8 This racquet is in very good condition, with just light scratches on the bumper guard, and a few small nicks. Tight round white polyester strings. This model can have either a 16x19 string pattern, or 16x16, depending on the grommets used. This one has the more open and spin friendly 16x16 grommets installed. Head Hydrosorb Pro replace- ment grip. 9.70 ounces as pictured with dampener. Head Graphene XT Instinct Rev Pro - 2014 Head Size: 100 sq. in. / 645 sq. cm. Length: 26.80 inches / 68.07 cm Strung Weight: 9.60 oz / 272 g Balance: 4pts HH Swing Weight: 305 Beam Width: 22.5mm Tip/Shaft: 27.0mm / 21.0mm Composition: Graphene XT/Graphite Power Level: Medium Stiffness: 61 String Pattern: 16 Mains/16 Crosses Main Skip: 8T,8H String Tension: 48-57 Tennis Head Racquet Review Originally published on 09/06/15 Arguably the most versatile racket in this year’s test, the onus is on control with the Instinct Rev Pro. The HEAD breeding is obvious in the build quality, and for such a light frame the feedback is superb. Our testers played with the racket in Rev mode, the open-pattern 16×16 string pattern that can be adjusted to 16×19 by replacing the grommet strip at three and nine-o’clock positions in between restrings. If you go for the 16×16 setup, the Instinct reacted best to steady strokes rather than full-blooded swipes, which might be better suited to the denser string pattern. Open string patterns tend to offer more power and more spin. TennisNuts.com Review Ultra light-weight racket with adaptable string pattern! Adapt your string pattern to traditional open string pattern (16x19) or a more extreme version (16x16) for more spin with the Head Graphene XT Instinct REV Pro. The Graphene XT version also has more extreme weight distribution towards the head and the handle of the racket. This shift is allowed by Graphene, the lightest and hardest material known. The result is even more power and manoeuvrability. The effortless power and ultra light-weight of Head Graphene XT Instinct REV Pro make it a perfect racket for juniors as well as club players who like a light racket and base their game around power from the baseline. Please note that the racket is supplied pre-strung in 16x16 string pattern with HEAD Lynx strings. You can change the string pattern by using an alternative grommets supplied separately. String pattern denotes the number of times mains strings (running vertically when racket is held up straight) and crosses (shorter horizontal strings) span the frame. So for example, in a 16x19 string pattern, strings will run as mains 16 times and 19 times as crosses. With 16x16 string pattern, strings traverse three times less on the crosses, leaving bigger gaps between strings. This allows the stringbed to brush the ball with more bite, creating more spin. In short, opt for 16x16 for extra topspin and power or 16x19 for better string durability and feel.