12mm "Basix" birchwood fixed circular knitting needles by Knit Pro. Birchwood is preferred by some people who feel they are kinder to hands than metal. They are also slightly grippier than metal so are useful when working with "slippery" or super smooth yarns.
Several lengths available.
Please note that the photograph is for illustration only and not a picture of the actual item, which is much thicker in diameter than those in the photograph.