K&S Brass Tubing in Metric sizes. 300mm long x 0.45mm wall thickness. This item has a thicker wall thickness than part number ks-brass-tb-metric225 These are Sold in 300mm (11.75") Length. We have the following sizes. The listed size is the outside diameter (od)Pn# 9822 : 4mm x .45 x 300mmPn# 9823 : 5mm x .45 x 300mmPn# 9824 : 6mm x .45 x 300mmPn# 9825 : 7mm x .45 x 300mmPn# 9826 : 8mm x .45 x 300mmPn# 9827 : 9mm x .45 x 300mm Pn# 9828 : 10mm x .45 x 300mm Note:- Picture 2 & 3 for reference only.- Tubing will telescope into the next larger or smaller size. This is useful for making bushings, sleeves, or drive shafts. See pictures 2 & 3.