If you usually use training balls, you can recommend Tianlong EF balls. Both WILSON and DUNLOP are good. The quality of the iron cans is relatively good, but the price is also more expensive.
General consumers do not have professional equipment, how to judge the quality of tennis?
First of all, when we get canned tennis balls, we must check whether the air pressure of the can is sufficient, because if the air pressure of the can is insufficient, it will affect the preservation of the memory tennis balls. If we get a bagged ball, we can squeeze the tennis ball with our hands to see if it will pop out immediately. If it is dented and will not bounce back, it must be a defective ball. At the same time, we should pay attention to the current market (especially the supermarket). There are tennis balls called “iron balls” that feel very hard when squeezed. These balls are cheap, but they are not really tennis balls. In addition, we can visually inspect the surface of the tennis ball to see whether the wool is stained and symmetrical, whether the color is consistent, whether there is agglomeration, whether the ruling is uniform, and whether the wool is wool or chemical fiber (the wool ball is thicker). In the test of elasticity, the ball can be freely dropped from a height of 2.54 meters to see how it rebounds on a concrete plane. Of course, the outer packaging of the product is intact and the printing pattern is clear is the most basic requirement of a product.
