Equipment: Fuel/oil/gas/water Specificity: Size: From 4 (women) to 3 (men) From 4 (women) to 6 (men) From 6 (women) to 4 (men) From 6 (women) to 8 (male)From 8 (female) to 6 (male)From 8 (female) to 10 (male)From 10 (female) to 6 (male)From 10 (female) to 8 (male)From 10 (female) to 12 (male) From 12 (female) to 10 (male) From 12 (female) to 16 (male) From 16 (female) to 12 (male) From 20 (female) to 16 (male) Product type: Reducer adapter female male Material : Anodized 6061 Aluminum Alloy Color: Black Feature: Female Male Single Point Fitting CNC Machined to Aerospace Grade High Quality Anodize for Durability and Strength Tight, Secure and Leak-Free Connection Thread is a special type of fitting used to connect flexible hoses and rigid metal pipes that carry fluid. It became popular for use in professional racing due to its ability to easily adapt new lines. From there, it spread to the automotive performance aftermarket due to its adaptability, upgradeability, and durability. Package include: 1PC Fixture