History. In 1910, Penn began manufacturing tennis balls in Jeannette, Pennsylvania. Penn has a subsequent history of innovation in tennis ball design: In 1922, Penn makes the first pressurized ball cans.

However, there is neither a special code nor a meaning related to these numbers. All tennis balls are the same within their brand. For example, all Wilson tennis balls have the same properties whether the printed number on them are1, 2, 3 or 4. The same goes for Dunlop, Penn, and other brands.

The numbers on PENN balls, or any other balls for that matter, are for identification purposes only, nothing more. When your ball rolls onto the court next to you knowing which ball is yours can be determined by the number on it. The numbers on balls are not a rating system--a PENN #1 is no different than a PENN #4.

Modern tennis balls must conform to certain size, weight, deformation, and bounce criteria to be approved for regulation play. The International Tennis Federation (ITF) defines the official diameter as 6.54–6.86 cm (2.57–2.70 inches). Balls must have masses in the range 56.0–59.4 g (1.98–2.10 ounces).

OFFICIAL BALL: Penn Championship is the Official Ball of USTA Leagues, so you know you're playing with high quality and consistent ball. Available in extra-duty felt, regular duty felt, or extra-duty high altitude felt.

Two kinds of Penn tennis balls are used at the Western & Southern Open. The ATP World Tour uses extra-duty balls, while the WTA uses regular-duty tennis balls.

The most expensive manufacturing material used is the felt ball cover. Today there are more than 200 different brands of tennis balls with over 350 million sold worldwide each year. Penn and Wilson tennis balls still maintain the biggest market share.

A display of the four tennis ball brands, Wilson, Penn, Babolat, and Dunlop before they are put through their test. Which Tennis Ball Brand Tops Them All?

A Wilson Tennis Ball is Made Raw rubber from Thailand, Vietnam and Malaysia is shaped and turned into a pressurized core called a slug. Multiple curing stages shape and work the slug into half shells, and then into a hollow sphere. The naked ball is then wrapped in that distinct fluorescent felt.

Rafael Nadal has criticized the Penn tennis ball being used at several tournaments, including this week at Indian Wells. "With a normal ball during day and night there is differences, but with that ball is completely dramatic how the things change," he said.

This tournament would be played with Green Vicky Tennis ball. 3. Each innings would start with a new ball.

A third challenge comes from tennis balls being a disposable product. There's a global challenge with around 300 million balls produced annually, while in the United States 125 million balls reportedly go to landfills each year.

360 million balls It is estimated that 360 million balls are manufactured each year all over the world.

'Dumb-bell' shaped blanks are cut from several layers of cloth at once by an automated stamping machine. Two blanks are then used to cover each ball. The edges of the blanks are coated with vulcanising solution, which ultimately forms the seam of the ball.

Ada, Ohio Since 1955, every leather Wilson football has been built by hand in Ada, Ohio, by our veteran team of skilled craftsmen and women.

WILSON Legacy All Court Roger Federer.