Package included: 1Pcs Outer Diameter 0.5mm - wall thickness 0.15mm - Inner Diameter 0.2mm 1Pcs Outer Diameter 1mm --- wall thickness 0.3mm --- Inner Diameter 0.4mm 1Pcs Outer Diameter 2mm --- wall thickness 0.3mm --- Inner Diameter 1.4mm 1Pcs Outer Diameter 4mm --- wall thickness 0.5mm --- Inner Diameter 3mm 1Pcs Outer Diameter 6mm --- wall thickness 1mm ------ Inner Diameter 4mm 1Pcs Outer Diameter 8mm --- wall thickness 1mm ------ Inner Diameter 6mm 1Pcs Outer Diameter 10mm - wall thickness 1mm ------ Inner Diameter 8mm 1Pcs Outer Diameter 12mm - wall thickness 1.2mm --- Inner Diameter 10.6mm 304 Stainless steels with good comprehensive properties,resist corrosion,resist oxidation, to resist high temperatures, easily clean. Designed for model making, model rail and boat, architectural design, prototype engineers, metal craft etc. May be bent to desired shape and cut to desired length.