Big mystery one from across the pond. I just got this over 10” x 2 3/4” x 1” from the uk. Only it had a big dip in the middle so probably much thinner now after lapping for about an hour and a half on sic and wet dry. Came oily but all cleaned up now. Found a name on the end of the box under the oil only can’t make it out. Seems finer after lapping and water only. Might be a decent finisher.