Tube Holder Dual Variable Flow, only Back Catalog number: 800073 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9982-50 Sorbent Tube, Porapak-P, 6X110, 100/50, 50/BX Price on request 800229 Tube holder plug for manifold Price on request 800262 Single Tube Holder Kit, 7 x 130mm [Draeger Long T Price on request