GELOB Badminton Shuttlecock Saver Badminton Ball Feather Prolongs Shuttlecock Life to 100 % max Improves Flight, Speed, And Accuracy Applies 120 + Shuttlecocks Per Bottle Effective For Any Feather Shuttlecocks Non-Flammable, Won't Oil Stain, Non-Sticky, No Hassle Spray Bottle