Based on this product's specifications, here are some alternatives and similar models
BESTSPORTING table tennis ball set 6 orange balls Ø40 mm Class 3 training model 23113
Summary description:
Set of 6 BESTSPORTING orange table tennis balls, each with a 40 mm diameter and Class 3 rating for training use. Designed for practice sessions, recreational play and coaching, these lightweight balls offer consistent bounce and visibility during drills. Suitable for clubs, schools and home training where durable, economical practice balls are required.