1.4 cylinder rotor head 2,certificate:ISO17799 3,material:speed steel 4,OEM sevice and design service offered 1.4 cylinder rotor head 2,certificate:ISO17799 3,high quality and reasonable price4,OEM sevice design ervice offered5,material:speed steel and bearing steel We also supply other types: 3 cylinder,4 cylinder,5 cylinder,6 cylinder. 146400-97209720146403-96209620146403-9620-19620146400- ...