can comprise a valve 106 as shown in fig1 or can comprise a connector configured for connection to a valve 106 the valve 106 can have at least two and preferably at least three operative positions fig1 depicts a 4 way valve 106 when the valve 106 is in the first position 108 no bodily fluid components can flow out of the proximal end 120 of the separation tube 100 in the first position 108 the proximal end 120 is effectively closed or sealed preferably in position 108 the valve 106 maintains the proximal end 120 sealed during centrifugation when the valve is in a second position 110 bodily fluid components can flow from or be drawn out of the separation tube 100 for example the bodily fluid components can be drawn from the separation tube via a syringe 122 or 114 or via any other suction type device the syringe 122 or 114 can be removably coupled via its male luer 126 to the separation tube 100 via a female luer 128 that is configured to removably couple to a male luer connection of the syringe 122 or 114 so that bodily fluids can be safely and easily withdrawn from the proximal end 120 in one presently preferred aspect the valve can include a plurality of separate passages.