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www.reference.com/article/cheap-tennis-ball-machines-6efedb53f203c3d2

Low- to mid-priced tennis ball machine models include Lobster and Wilson, with prices ranging from a few hundred to over $1,000, as of 2015. Standard tennis ball machines can cost anywhere from $1,500 to $6,000, depending on the machine's specifications and features.

www.reference.com/article/brands-dog-tennis-ball-machines-f7efbcfd86780d6a

Some brands of tennis ball machines for dogs include Hyper, GoDogGo and iFetch. The Hyper dog ball launcher shoots balls up to 220 feet and comes with four tennis balls. It does not does not require assembly.

www.reference.com/article/tennis-balls-made-465edc4e091bf50d

Tennis balls are made out of a hollow rubber core covered by a wool or nylon shell. In addition, the air inside the rubber core is pressurized so that the ball bounces evenly.

www.reference.com/world-view/size-tennis-ball-d70929d89c2bd15e

An official tennis ball is between 2.575 inches and 2.7 inches in diameter as defined by the International Tennis Federation. Tennis balls also must conform to other criteria if they are to be used in regulation play.

www.reference.com/article/highly-rated-affordable-tennis-ball-machines-1cfc206dd9205d74

The Lobster Elite 3, SAM Model P4, Tennis Tower and Wilson Ball Machine are all highly rated, affordable tennis ball machines. The Lobster Elite 3 and Wilson Ball Machine are battery operated, while the Tennis Tower runs on 100 Watts AC. The SAM Model P4 runs on battery or AC.

www.reference.com/article/mass-tennis-ball-2ff64f726e277acc

The mass of a standard tennis ball is .057 kilograms. Mass is the measurement indicating the amount of matter in an object.

www.reference.com/article/diameter-tennis-ball-c972fc9f6916a294

The official diameter of a tennis ball according to the International Tennis Federation must be between 2.575 and 2.7 inches. Tennis balls are sold in cylinders containing three per package.

www.reference.com/article/lobster-486e11b188b360ba

Lobsters are 10-legged crustaceans that are dwell along the bottom of oceans, freshwater and brackish environments. They are closely related to crabs and shrimp and are often caught and sold as food.

www.reference.com/article/lobsters-6774e1dc0057c2cc

Lobsters are made up of a family of marine crustaceans. They have hard exoskeletons to protect their body, which they must shed and regrow as they mature and get bigger.

www.reference.com/article/goes-well-lobster-773592bd9728c637

Lobster is a popular seafood that can be served either hot or cold. It can be paired with a variety of side dishes. Lobster has a mild flavor on its own, so it pairs well with lots of different foods.