Tachikara SV5WSC Sensi Tec&reg; Composite High Performance Volleyball Circumference: 25.6 - 26.4 in./65.02 - 67.06 cm. Weight: 9.1 - 9.8 oz./257.98 - 277.83 g Cover: Sensi-Tec Construction: Loose Bladder Construction (LBC) Bladder: Butyl