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