DUNLOP-Biomimetic M 4.0 Tennis Racquet-() The Dunlop Biomimetic M 4.0 Tennis Racquet Tennis... Aeroskin Cx Technology | Mos2 Grommets | Forgiving Sweet Spot Size - (4_1/2) | Color - (See Description) Authorized Dunlop Dealer. All racquets are strung and ready for the courts! SEE SELLER DETAILS FOR RETURN POLICY.