The TSP 1 star Astoll balls are for practice only. You require 3 stars balls in tournaments.

The balls are made of a high-bouncing gas-filled celluloid with a matte finish.

The Stars on the ball indicate the quality of the ball: 3 stars is the highest, indicating that it is of the best quality, 2 stars is for practice, 1 star is for family and recreation.

Select the color of the ball based on the floor color. If you are playing on a yellow gym floor, select white balls. Select orange balls if the floor is red, blue, green etc...

• White color
  
• Consistent bounce
• Excellent Spin
• Made In Japan
  

Select the color of the table tennis ball based on the floor color. If you are playing on a yellow gym floor, select white balls. Select orange balls if the floor is red, blue, green etc... 

ITTF Table Tennis Rule about table tennis balls:

2.3 THE BALL

2.3.1 The ball shall be spherical, with a diameter of 40mm.
2.3.2 The ball shall weigh 2.7g.
2.3.3 The ball shall be made of celluloid or similar plastics material and shall be
white or orange, and matt.

About TSP

TSP brand is a leading Japanese brand making the best quality table tennis equipments from 1934. The history of TSP goes back to the time when other Japanese table tennis brands like Butterfly started production of table tennis equipments and distributing to the world. The TSP brand is known for it's high quality long pips such as TSP Curl P1R which is still being used by world class defensive players like Joo Se Hyuk (World Top #8) of Korea and Chen Weixing (World Top #8 in 2006) of Austria. The TSP has a line of table tennis products to improve the game of the players. In Japan, TSP is the distributor for XIOM table tennis products.

TSP makes table tennis blades, table tennis balls, table tennis paddles, table tennis rackets, table tennis rubbers, table tennis apparels, table tennis glues, ping pong tables and table tennis tables. You can read about TSP table tennis products here.