TADICK 100 Pack 3-Star Ping Pong Ball Premium Table Tennis Balls High bounce ,Tough ,Decent Spin Premium training balls for all -lever players. 100 Balls included TADICK is a Registered Trademark of Great Store Ball Weight (g): 2.7-2.85, Ball Diameter (mm): 40.1- 40.25 Attention :100% MONEY BACK GUARANTEE For 60 Days customers satisfaction . Any unhappy ,Please contact seller ( Great -Store ) directly for best solution