Fresh taken blood or serum should, if transported by letterpost, packed following the guidline P650. Examples how to pack are: take a transportblister 1 position (ref. 460...), roll the tube in an absorbent sheet (460197) put the tube in the blister and close the blister. Stack the blister in a leakproof SafetyBag and use the cardbox MiniMailBox (ref. 20121). If you will send at once more blood tubes use for example the 2 or 3 position transportblister or the the multi functional 6 position Transportblister(ref. 460...) suitable for 3 x 10 ml tubes + 2 x 5 ml or 6 x 5 ml tubes.