INcreased High quality of Silicon TPU: with high elasticity strong durable silicone material without fading or cracking . anti-rust ,anti-scratch,weather -proof and anti-rattle, heat and cold resistant, no deformation, no icing and no fading in the range of -40~240°F, The plates will never melt at 240°F or crack at -40°F. And the plates don't lose shape under pressure or when bent .