Recommended for extremely high pressure and high impulse hydraulic applications. Exceeds all performance requirements for ISO 18752 Grade D, SAE 100R12, EN 856 R12, performance requirements of EN 856 4SP, and ISO 3862 Type R12. Recommended Couplings: GlobalSpiral Couplings, GlobalSpiral Plus Couplings, Special One-Piece Coupling (MC4-20 Crimper Only) (-20), Stainless Steel B Couplings (-20), Stainless Steel S Couplings (-24 and -32).