Features: Ceramic boots withstand temperatures up to 2,000 degrees Fahrenheit. 8mm double silicone construction black wires rated at 600 degrees Fahrenheit. 500 Ohms/foot ferro-sprial core offers the highest level of RFI/EMI suppression. The Extreme 9000 Ceramic Wires also feature stainless steel spark plug terminals for maximum spark energy to the plugs. Boots available in both straight and right angle configurations. Specifications: Application: GM LS/LT Engines Color: White & Black Size: 26.5*11.5*5cm/10.4*4.5*2in Weight: 770g/1.7Ib Material: Silicone Boot Material: Ceramic Resistance: 500 Ohms Per Foot Boot Temperature Rating: 2000 Degrees Spark Plug Boot Angle: 135 Degree Core: Ferro-Spiral Wire Diameter: 8mm Manufacturer Part Number: 9070C Wire Series: Wire Series Wire Temp Rating: 600 Degrees Package List: 8 Spark Plug Wires