Yonex Percept 100 2025 Tennis Racquet - Midnight NavyOverview New technology and structure combine with innovation to increase string snapback and movement, giving players access to the most spin in Yonex tennis history. For intermediate to advanced players looking for a flexible racquet with precision and feel. Specifications Head Size (sq in): 100 Length (in): 27. 0 String Pattern: 16x19 Unstrung balance: 320 mm Unstrung weight (ounces): 10. 6