TeamPack Dual-Port High Flow Inflation Needles by Ridgeline Trail Sports are made to provide increased inflation rates when compared to standard needles . Their design includes a side port not found on most standard needles that is advantageous to allow for increased airlow, especially in tight spaces. The combination of these two ports speeds inflation of common sports balls. Use with footballs, basketballs, soccer balls, volleyballs, and virtually any sports equipment or play toys that require inflation needles. The threaded back design fits most common bicycle type pumps (pump not included). They are available in different volume mult-packs, sized to fit your needs. Choose from the size-pack size, perfect for home use when you only need a few needles. Our 12-pack size is ideal for small sports teams and individual players. The 18, 24, and 30 pack sizes are intended for coaches, referrees, and sports clubs - those people and places where inflation needles just always seem to disappear. Each pack is economically priced, conveinant because sport fanatics just can't have too many of these around.