100 Penn Class "A" Used Tennis Balls Why buy dirty or older tennis balls? Buy CLEAN. These are not your typical used balls. You will be pleasantly surprised by the quality and consistency of these balls for tennis practice, for your dog or for any other use. High Value and Consistency. We separate all balls into one of three classes: A, B and C as seen below. Each of these balls has been inspected and packed in a brand new box. No dead balls, no clay, no dirt, nothing old. Just 100% fresh and reasonably clean as they are in this picture. Buy with 100% Confidence. As part of a growing, successful, 29 year old family run business, we take pride in our reputation amongst the many thousands of customers across the US and Canada. Our staff is passionate about maintaining our exceptional feedback rating. Very Good is not good enough. We have built our long standing company on "WOW's" and leaving every customer with a smile, regardless of the situation. If you are not 100% satisfied, we will make it right, with a smile, immediately. Help us improve our planet and the game of tennis. Over 200 million tennis balls go into US landfills every year. We are a Vermont Initiative that is taking steps to help reduce this waste by recycling gently played tennis balls. All proceeds from these efforts will go towards expanding this initiative.