Schildkrot 3 Star Super table tennis balls are extra hard and used in major international tournaments. Before they leave our factory they undergo rigorous tests that are even stricter than those defined by the ITTF.
The ball is supposed to weigh 2.7g (according to ITTF). Schildkrot 40+ is heavier than ideal. But it is very round, similar to Nittaku Premium 40+ and Butterfly G40+. Identical to the more popular XuShaoFa 40+ seamless.
Weight: 2.75 +/- 0.02g (ITTF requires: 2.67-2.77g).