DUNLOP HD 16 balls FORT 14 balls St. 27 balls Total 57 balls Used for 2 hours per week for 2 months. They can be sufficiently used for serve, volley, and rally practice. Dunlop Fort About 5 balls were used on a rainy day and are fuzzy, but the air pressure is the same as the others and they have not lost much air. Thank you for looking. Thank you for your consideration.