The Alfagomma X-C61S Two-Piece Fittings are straight, carbon steel hose fittings designed for use with spiral wire reinforced hoses. They feature an O-Ring flange connection, specifically SAE J518 Code 61, providing a secure and leak-resistant seal. Ferrules are metal rings that help secure the hose to the fitting, ensuring a tight and reliable connection. The key difference between two-piece and one-piece fittings is that two-piece fittings are made up of separate components that can be assembled and disassembled, offering greater flexibility, while one-piece fittings are fixed and cannot be separated. The X Series fittings require both internal and external skiving, a process where the hose ends are trimmed to fit properly, and they use XF1 or XF2 Interlock ferrules to ensure a secure, high-pressure connection. This combination of skiving and ferrules ensures optimal performance and reliability in demanding applications.