Click on the 'Approved Tennis Balls' link on this page to see a list of manufactures and ball numbers approved by the International Tennis Federation (ITF) for the 2007 season. There must be at least 200 tennis balls listed on the linked page.
Because not like other balls they have four different types of balls. These balls have different speeds.
well there are many different types of golf balls some are expensive and some of them are dirt cheap. the different brands of golf balls is hard to know because some are being used which you havent heard of. i say though on the PGA tour around about 10-15 different brands of balls are used. Examples, Nike, Callaway, Bridgestone, Srixon, Titliest, Top Flite not (flight) and many other brands of golf balls are being used which i probably don't know about.
Tool for playing tennis usually call tennis racket. There are a lot of types and brands of modern tennis rackets.
it is red because it is made for different types of court
There are a few different types of exercise balls. One can get large exercise balls, mini balls, medicine balls, small toning balls, foot massage balls and weighted exercise balls.
their are 908 different water brands in this world
8
there are different sizes and colors
5 gum
there is no such thing as a type of ball python... but there are morphs of them.
There are many different types of diabetes tests out there. There are good brands and bad brands. It all depends on your budget. Here you can buy and see different types of tests. http://www.americandiabeteswholesale.com/
A basketball and a globe could be some types of spheres. Orange, soccer ball, marbles, planets, tennis balls, and other balls I guess.