Abstract: A centrifugation support for a receptacle (15) where the support comprises a strip (11) formed of a flexible plastics material, the strip (11) having a width corresponding to a substantial portion of the height of the receptacle (15) and a length sufficient to be wrapped around the receptacle (15) with the end portions (13 and 14) overlapping, wherein the overlapping surfaces of the end portions (13 and 14) which abut each other when the strip (11) is wrapped around the receptacle (15) have a blocking characteristic and the remainder of the surface of the strip (11) is substantially tack free.