The Tachikara(R) SV18S Volleyball provides great performance for recreational indoor use. Built with Tachikara's(R) Single Unit Construction(R), the SV18S indoor volleyball features a composite leather outer, durable bladder and woven cotton reinforcement panel. This results in an air-tight and durable ball that's ideal for clubs, camp and other institutional groups with repetitive use. FEATURES: Composite leather indoor volleyball Woven-fiber v100 composite cover Single Unit Construction(R) offers true flight characteristics Quad carbon, isomer bladder internally suspended for increased air retention and durability Woven cotton reinforcement panels for a soft and consistent touch Durable butyl rubber bladder Great for institutional and repetitive use Weight: 9.1 - 9.8 oz Circumference: 25.6" - 26.4" Model: SV18S Click here for additional information relating to the Manufacturer's Warranty.