These are used in the same applications as our NFE Commander series (same ISO 16028 interchange), however the base models have higher pressure ratings than the NFE and they are available for users or OEM's who request the Aeroquip brand only (or previously Aeroquip & Hansen) - as they are made to more stringent quality control standards. Aeroquip also offers the below convenient "colour coding sleeves" for use on the Aeroquip FF Series quick connects. These quick connects are compatible with Parker FF370, Safeway FF49 series, Perfecting H series, Hansen QA29000, Aeroquip FD49 series and replaces Aeroquip FD89/FD99 series. They come with Buna-N seals (-29°C (-20°F) to +100°C (+212°F), higher temperature viton seals available upon request).