Edelbrock/Russell 660420 Blue Anodized Aluminum -4AN Flare to 1/8" NPT Pipe Straight Adapter Measures -4 AN flare to 1/8'' NPT Has a blue anodized finish Made of extremely durable 303 stainless steel and precision machined to ensure precise thread engagement and a tight seal Provides maximum protection against corrosion and the ultimate in strength and appearance Features a unique taper design for easy assembly