... prices 2.high output 3.more stable, brand electrical parts. single screw extruderMain Technical Parameters ModelScrew diameter (mm)L/D RatioMain motor ... brand ,such as Schneider, Yaskawa,Simens,Omron, ABS, etc..---Material of screw and barrel: 38CrMoAlA Azotizing on surface 0.4~0.7mm ... abroad---Steady function and long-time life , easy to handle. single screw extruder