"Material" : High-temperature resistant polyester filament "Size" : Due to the special machine production of the material, the finished product has a certain elastic range. A width error of ± 1 to 3mm is within the normal range. If the buyer has strict requirements for the specifications, please contact the store first to understand its performance before placing an order. Thank you for your understanding and support! Features: Elastic, not prone to deformation, does not discolor easily after exposure to sunlight, and environmentally friendly