From X Factory:
X Factory announces their great carbide diff balls now come in a pack of 14. Many modern 1/10 vehicles now use 14 balls in their diffs instead of the old 12. These 3/32” carbide balls are grade 10, which is a superior grade to most available. X Factory has long sold them in packs of 12, and most drivers report smoother diffs with less ring wear so they hold adjustment better and last longer between re-builds. Grade 10 carbide balls have fewer surface imperfections than the standard grade 25 carbide ball.
Perhaps just as important, these superior carbide balls are priced lower than others! X Factory continues to supply top quality at affordable pricing.