Thank you for viewing. This is a 1.5mm thick carbon fiber upper deck set for the F103 chassis, designed to increase rigidity. - Model Name: F103 Long Carbon Upper Deck Set - Model Number: OP-1081 - Compatible with: ALL F103 CHASSIS (Not compatible with F103L and F103LM) - Material: Carbon Fiber (1.5mm thick) - Year of Manufacture: 2008 The packaging is old, so there is some dirt and discoloration. All of this information is quoted from the internet. I am not an expert. Please let me know if any information is incorrect.