Spark Plug Wire Set-Base MSD 31189spark plug boot color : Gray spark plug boot material : Silicone and Synthetic wire material : Silicone and Synthetic distributor terminal ends : HEI distributor boot color : Gray includes coil wire : Yes number of wires : 8 rfi suppression : Yes color : Red manufacturer part number : 31189 california prop 65 warning : This product can expose you to chemicals which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information visit www.P65Warnings.ca.gov spark plug boot ends : Straight diameter (mm) : 8.5 Millimeter distributor boot material : Silicone and Synthetic upc : 85132311897 brand : MSD Ignition product shipping template : Migrated Template mpn : 31189 wire resistance : 40 To 50 Ohms Per Foot Resistance conductor type : Copper Alloy With Ferro Magnetic Impregnated Center Core