Brass Flare inserts are tube adaptors which should fit snugly with interference fit. You'll have no leaks and no worries when you shorten your brake lines and use these inserts correctly. They make changing that brake line easier and are a must-have if you are working with hydraulic brake lines.

Replacement inverted flare seat for -03AN / -04AN fittings   5 Pack

Brass Flare inserts are tube adaptors which should fit snugly with interference fit. You'll have no leaks and no worries when you shorten your brake lines and use these inserts correctly. They make changing that brake line easier and are a must-have if you are working with hydraulic brake lines.

Replacement inverted flare seat for -03AN / -04AN fittings   5 Pack