This sounds like an aluminium swingout for the Sorvall Superspeed. We used to have one but junked it in a recent move of labs (alas, along with the documentation). If no-one else has any info, you could try Dupont. -- Mick.Partis at HRI.AC.UK Horticulture Research International Tel: 01789-470382 FAX: 01789-470552