Brand Ref (13083103310) - Crossbar holder, for 12mm rod, 33,7mm curved back stainl. st. 304 mirror polished, for tube 33,7mm, Brand Ref (13083104210) - Crossbar holder, for 12mm rod, 42,4mm curved back stainl. st. 304 mirror polished, for tube 42,4mm, Material:304 Grade (V2A) Stainless Steel, Finish:Mirror Polished