Sanwei 40+ ABS 1 Star Training Balls are plastic balls with seam, which are made of ABS (acrylonitrile-butadiene-styrene copolymers), and are produced in China.
These training balls are very uniformly/consistently round and hard, resulting in high-quality gaming properties and in a long durability. Compared to other plastic training balls, the Sanwei 40+ ABS balls exhibit a general superiority. This is not only related to its qualities, but also to the bounce behavior of the balls, rotation, sound, and durability. Furthermore, these training balls are very similar to the former celluloid balls. Since the Sanwei 40+ ABS balls are also available in a large pack (100 balls), they are less expensive compared to other plastic balls. This is further evidence for the great price-performance-ratio.