The tube has a media plug impregnated with dehydrated media positioned within the tube near the top of a region of restricted diameter, and {HEAD ~ a compartment} of rehydrating fluid located in {TAIL ~ a cap} on the tube 
located in
The tube has a media plug impregnated with dehydrated media positioned within the tube near the top of a region of restricted diameter , and { HEAD ~ a compartment } of rehydrating fluid located in { TAIL ~ a cap } on the tube
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH