Features: 1. Toughness is very strong --- the continuation, constant folding, not breaking, smashing, squeezing is not bad, we use [polycarbonate] as the main raw material. Our usual glasses, bulletproof glass, goggles, bank bulletproof glass, headlights, etc. are made of this material.2.Protect the kettle - to avoid scratching the kettle [low coefficient of friction] In general, the kettle is made of plastic, and the coefficient of friction between plastic and plastic is much smaller than between plastic and metal (aluminum bottle cage). Very goodTo protect the kettle.3.Good elasticity [big point of the kettle to eat] Because the material elasticity is very good, the size of the kettle is not so big, in general, the normal size of the kettle can be used without any problems.Noted1.Please allow 0-1cm error due to manual measurement. 2. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.