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TW Racquet Experts
Selecting the right racquet and string for your game can be a difficult task. When you consider the tremendous amount of racquets available, and pair them with the even larger selection of strings on the market, you are looking at a mountain of combinations! Here at Tennis Warehouse, we want to make the selection process a bit easier for you. That's why we have a talented group of Racquet Experts on staff to help each player find the right racquet and string combination for their play style. Call or email us with your questions, and a Racquet Expert will be happy to point you in the right direction!

Toll Free: 1.800.799.9230


Hours: M-F 6am-6pm, S/S 9am-6pm


Ordering racquets: Select from the options below to customize your racquet. We string according to your specifications. Follow the instructions below for selecting a string and be sure to enter tension.

Note about custom hybrid stringing

*If the string you want is not in the menu, select "String not in this menu" and on the next page type the name of the string into the stringing instructions. The price of the string will be added to your order once processed.

Stringing information for : None available

With its big sweetspot and comfortable response, the Donnay Formula OS EXT is a versatile frame with on-demand power. Beginners and intermediates with compact to medium strokes will have no problem achieving depth. Those with longer strokes will appreciate the open pattern, allowing them to tame the power with spin. Doubles players will appreciate both the stability on block volleys and the power on put aways. On serves, the extra length (27.25 inches) makes for greater power and spin. All in all, this is a very promising oversize frame that should work very well for a wide variety of players.

Strung Specifications

Head Size:
110 sq. in. / 709.68 sq. cm.
Length: 27.25in / 69.85cm
Strung Weight: 10oz / 283.5g
Balance: 5 pts HH
Swingweight: 322
Stiffness: 73
Beam Width: 23mm / 25.5mm / 25mm /
Composition: XeneCore / Graphite
Power Level: Medium-High
Stroke Style: Compact-Medium
Swing Speed: Slow-Moderate
Racquet Colors:
Black/ Gold
Grip Type: Donnay Synthetic
String Pattern:
16 Mains / 20 Crosses
Mains skip: 7T 9T 7H 9H
Two Pieces
No Shared Holes
String Tension: 40-60 pounds

Other Items to Consider

  • Wilson Pro Overgrip 12-pack $12.95

    Add a 12 pack of Wilson Pro Overgrips to your Racquet purchase for just $12.95. You Save $3.

Similar Racquets

Dunlop Biomimetic 600 Lite Racquet
Dunlop Biomimetic 600 Lite
Price: $89.00
only. Racquet choice of Dominika Cibulkova, this maneuverable racquet is ideal for 3.0-4.5 players looking for a generous sweet spot and excellent control. Headsize: 105 sq in. Weight: 10.01 oz. String Pattern: 16x19. Stiffness: 69 (RA).

Save an extra $10 per racquet when you purchase 2 or more!