1)-Factory outlets. 2)-Low-cost advantages. 3)-Passed ISO certification. 4)-Our factory has 23 ... truck parts manufacturer. Our products includes Clutch Booster,air dryer,hand brake valve,foot brake valve,relay valve ... leveling valve,trailer control valve,gland head,elecric coupler,air hose,spring brake chamber,seven electric coupler,diaphragm,slack adjuster ... ,neoplan,ivevo,ford,zf and so on.. Air hose