K & S Metal Brass Round TubeK & S Metal 2mm Brass Square Tube .45mm Wall L300mm (2pk) 9850 Size Wall Thickness Length Pack SKU 2mm Brass Square Tube0.45mmL300mm2pk9850 3mm Brass Square Tube0.45mmL300mm2pk9851 5mm Brass Square Tube0.45mmL300mm2pk9853 6mm Brass Square Tube0.45mmL300mm1pk9854