M/s RSM Overseas

tennis ball is a ball designed for the sport of tennis. Tennis balls are fluorescent yellow in organised competitions, but in recreational play can be virtually any color. Tennis balls are covered in a fibrous felt which modifies their aerodynamic properties, and each has a white curvilinear oval covering it. 
Weight: ITF regulations state that a tennis ball must weigh between 56 and 59.4 grams. The weight of the ball mainly influences feel on the racket. Deformation: we measure the effort required to deform the ball by 2.54cm
The unmistakable shade of the tennis ball is officially called "optic yellow" by the ITF. But a Google search for "optic yellow color" leads to the online color encyclopedia ColorHexa. There, the shade is listed as #ccff00 and marked as "Fluorescent yellow or Electric lime