1 .Raw material: PA6, PA12, PA11 etc. 2. ISO9001-2008 quality control. 3. Air brake hose for trucks and trailers. Spiral Brake Hose Series (smooth inner wall, quick response, low pressure loss, friction and aging resistance and good flexibility etc.)1. Applications : widely used in the air brake connections for various tractors, trucks and trailers. 2. Raw material: PA6, PA12, PA11. 3. Size: 12mm ...