FPP Outlet offers ferrule sleeves from superior brand Parker at competitive, wholesale prices. Compression ferrule sleeves are constructed of brass material. Compression ferrule sleeves provides a seal when compressed between two mating components. These are used to create a watertight or airtight connection in either copper, nylon, or plastic tubing or pipes for a leak-resistant seal. They are made typically of Brass to prevent corrosion, ductility at high temperatures, and low magnetic permeability. Orders placed by 2 p.m. usually ship the same day.