Or something similar of a decorative nature...Needs to be slightly larger than the conical covers (maybe 2cm's greater in diametre?) that meet the wall to cover the pipes on a bar mixer shower. Small but visible chip out of tile just peeping out from one of the covers, happened when drilling holes. Plan would be to install it just behind covers so it looks like part of design and covers crack. Thought of silicone but too rough a look, don't want to move shower valve as it's perfectly positioned. Any ideas?