Onix Fuse Indoor Pickleball 6 Pack The Onix Fuse Indoor Pickleball 6 Pack of pickleballs features specially designed balls that help to enhance your pickleball gameplay. These balls are made with a smooth seam and symmetrical halves for consistent flight and rebound. Precision holes provide optimal balance. USAPA Tournament Approved. Feature True Flight™ technology. Package includes 6 pickleballs.