The Edelbrock/Russell Single Endura Full Flow Straight Hose End features a unique taper design for easy assembly with extreme corrosion resistance. The primary adapter ring is separately machined at a 37 degree angle to assure a positive connecting surface. The pin is made of stainless steel that secures the mating nut to the main seal body and provides a full and unobstructed swivel. The hex designed brazed nipple provides a greater holding area for greater strength and easier assembly.