Abstract. This report summarizes the results of a EUROMET comparison of 1 kg mass standards carried out between 25 laboratories. The transfer standards comprised four stainless steel 1 kg weights, two of which were circulated in each of two separate loops. The majority of the results of the participants are consistent both with each other and with the key comparison reference value (KCRV) of comparison CCM.M-K1 to which this comparison has been linked

Main text. To reach the main text of this Paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.

The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (MRA).