Calls the Tectonic series the most durable Li-Ning rackets they have used: their Tectonic 7 Combat took 42 lbs before the grommets started to sink.
“The Tectonic series was my favorite in terms of durability, I test with the tectonic 7C with Li-Ning No.7 and got the racket up to 42lbs with 5% pre stretch before the grommets started to sink.”