Comparison : Item # SF075050SP, 3/4 x 1/2 Inch (in) Size Zinc Plated Steel NPT Reducing/Increasing Combination Nipple
Item # SF075100SP, 3/4 x 1 Inch (in) Size Zinc Plated Steel NPT Reducing/Increasing Combination Nipple
Item # SF100075SP, 1 x 3/4 Inch (in) Size Zinc Plated Steel NPT Reducing/Increasing Combination Nipple
Item # SF100125SP, 1 x 1 1/4 Inch (in) Size Zinc Plated Steel NPT Reducing/Increasing Combination Nipple
Item # SF125100SP, 1 1/4 x 1 Inch (in) Size Zinc Plated Steel NPT Reducing/Increasing Combination Nipple