DEI Onyx Series Flexible Heat Shield (4" x 8") (Black) DEI has launched the next generation of heat protection performance! Using a combination of advanced textiles, DEI developed a flexible heat shield solution that looks great and outperforms other conventional heat shields available today. This enhanced performance starts by joining two durable materials together forming a dual-layer design. The outer layer is made from heat-treated glass fiber that is bonded with molten aluminum and then formed into a tight weave for durability and strength.More effective than traditional metal heat shields.Capable of handling high temperature exposure up to The outer edge is finished off with a surge stitch for durability. All hardware is stainless steel.