Comparison : Item # NH1626C100B, 45º Elbow for Inch-Size Tube
Item # NH1626D100B, 45º Elbow for Inch-Size Tube
Item # NH1626N100B, 45º Elbow for Inch-Size Tube
Item # NH1626S100B, 45º Elbow for Inch-Size Tube
Item # NH1626V100B, 45º Elbow for Inch-Size Tube
Image