Tube Holder Triple Variable Flow, only Back Catalog number: 800074 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800073 Tube Holder Dual Variable Flow, only Price on request 811-9981-50 Sorbent Tube, Porapak-N, 6X70, 88/44, 50/BX Price on request 811-9902-20 Charcoal Tube, Coconut Shell, Large, 200/400mg, 8x Price on request