Tecnifibre Bullit RS 23 Junior The Tecnifibre Bullit RS 23 junior tennis racquet features premium technologies to make this beginner frame the optimal choice for up and coming players. With Reinforced Structure (RS), two "I-beams" are made part of the frame to help improve racquet durability by up to 20%. The Technifibre Extense Bumper covering the racquet head provides further protection and durability. Ideal for players ages 6 to 8. Features a fun and exciting design. Features a maneuverable swing weight for new players.