Tube Holder Single Variable Flow, only Back Catalog number: 800072 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9902-20 Charcoal Tube, Coconut Shell, Large, 200/400mg, 8x Price on request 800149 Single Tube Holder Kit, 6 x 70mm (Standard Charcoa Price on request 811-9962-50 Sorbent Tube, Chromosorb-102, 8X110, 100/50, 50/BX Price on request