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 200112 Tube Holder Housing, 7-10 x 150mm, 5/8", L255 Price on request 811-9976-20 Sorbent Tube, XAD-2, 6X110, 150/75, 20/BX Price on request 800075 Tube Holder Quad Variable Flow, only Price on request