The dimensions refer to the item offered here in mm inside diameter ID-ID slotted on both sides! Material thickness: 1.25mm - 1.5mm / ATTENTION depending on how the article is made, the material thickness can differ because the processing changes by expanding or impanding! The adapters/sleeves and connectors offered here are made of stainless steel 1.4301 V2A, thus achieving a long service life. The production of such connectors is made from standard meter goods pipe in different diameters, which are cut to size and according to the following procedure: cutting > absolved > Press > Expand > impending are processed. Due to the specific one-off production, it is possible for us to act according to your wishes and to manufacture as required. Do you have any questions about our offers? Feel f.