1. SAE J1401 standard 2. NBR material 3. low expansion coefficient 4. aging resistant 5. corrosion resistant 1. The structure of this brake hose is : endothecium (NBR)+middle lamella (Double polyurethane knitting)+outer protection (EPDM or other rubber)2. specialty: low expansion coefficient, aging resistant, corrosion resistant, high and low temperature resistant3. used transmit pressure for all ...