1. material :stainless steel 304 ,din standard. 2. serious cleaness and high roughness 3. good surface. 4. ultrasonic clean. 1.materialstainless steel,brass,copper2.processtube/rod + cnc machining + laser marking3.quality controlfc dimension 0 defects4.strengthesgood quality ,competitive price,small order, perfect logistics service5.charactorsdurable ,weldable,human based6.out lookdeburrs, ...