... questions, do not hesitate to contact me right now. With kind regards!Yours,Susan 1. EXTRUSION PART: 1ModelSJ-2002Screw ... .7mm,rectangle grooves all around the cylinder,screw flange with location pin, no welding.11Head section flange45# steel12Screw and cylinderSuper ... ,Steady transmission, lower noise, excellent transmission efficiency,.Along with oil filter unit.16Oil pumpDirectly-link mode CB-B( ...