Sorbent Tube, Porapak-P, 6X110, 100/50, 50/BX Back Catalog number: 811-9982-50 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9978-20 Sorbent Tube, XAD-2, 8X110, 450/225, 20/BX Price on request 800231 Tube Holder Kit, Quad Variable, 6 x 70mm Price on request 200187 Tube Holder Adapter, 3/16" to 1/4" Ends Price on request