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 800063 Tube Holder Housing End, 1/2" for 5mm OD Price on request 811-9974-50 Sorbent Tube, XAD-2, 8X110, 150/75, 50/BX Price on request 200157 U-Tube replacement for P/N 800143 Price on request