1. material :stainless steel ,din standard. 2. serious cleaness and high roughness 3. good surface. 4. ultrasonic clean 1.the material: stainless steel 303/ 304, durabel and good corrosion.2. process: tube/rod + cnc machining3. torlerance:FC dimensions 0 defects,high precision in cleaness and roughness..4.durable,weldable,flexible,human-based,light5.economic and reasonable packing:carton box+, ...