1.aluminium sleeve/ferrule DIN3093, 2.size: from 1mm to 60mm 3.zinc plated, nickle ... plated, chrone plated are available aluminium sleeve/ferrule DIN3093, size: from 1mm to 60mmzinc plated, nickle plated, chrone plated ... are available on requestWe supply the aluminium sleeve in DIN3093, oval sleeves, stop botton, ferrulesjis type, ferrules form C, copper ...