Tennis players and coaches, listen up - this case of PENN Pro Marathon balls is exactly what you need for serious court time! You get a full case of 24 cans of the regular duty yellow balls, which are perfect for most court surfaces. These aren't your average tennis balls - the Pro Marathon line is specifically designed to last longer than standard balls, which means you get more play time before they go dead. The bright yellow color (size 105.5) is highly visible against any court background, and the regular duty felt is optimized for clay and indoor courts. If you're running a tennis program, coaching a team, or just play a ton of tennis, buying by the case is way more economical than grabbing cans here and there. The quality is consistently good - PENN is one of the most trusted brands in tennis for a reason. These balls have that perfect bounce and feel that serious players appreciate. Oh, and if you order twelve or more cases, you get free shipping, which is pretty sweet if you're stocking up for a season or a big tournament. Whether you're supplying balls for team practice, club play, or just want to make sure you never run out of fresh balls, this case gives you plenty to work with. The cans store well too, so you don't have to worry about them going bad if you don't use them all right away. Seriously, if you play regularly, buying by the case just makes sense financially and practically!