Official volleyball antennae is made of durable glass fiber and features clamps that attach to both the top and bottom of net. It's patented design fits both 36" and 1 meter nets and each set includes two red and white antennae and bag. Tandem Sport has been manufacturing and distributing quality volleyball, sports medicine, equipment, and training devices to the sporting goods market since 1989. Tandem Sport focuses on supports and training equipment.