Franklin NHL High Density Balls/12pc Mesh Bag. Official size 2 5/8" High Density Street Hockey Balls; Packaged 12 balls per expandable bag; Bag conveniently clips on goal netting; AGS (Active Gravity System) is a patented design that uses a superior no-bounce technology to sustain a lower center of gravity in each ball; A proprietary micro-pellet dampening material suspended within a liquid keeps the ball from bouncing for better passing, shooting, and control. For use above 32 degrees F.