Brand Ref (14083103310) - Double crossbar holder, for 12mm rod, curved back stainl. st. 316 mirror polished, for tube 33,7mm, Brand Ref (14083104210) - Double crossbar holder, for 12mm rod, curved back stainl. st. 316 mirror polished, for tube 42,4mm, Material:316 Grade (V4A) Stainless Steel, Finish:Mirror Polished