Sorbent Tube, XAD-2, 8X110, 450/225, 20/BX Back Catalog number: 811-9978-20 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 800074 Tube Holder Triple Variable Flow, only Price on request 200102 Tube Holder Housing, 6x70mm, 1/2" OD, S225 Price on request