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 800238 Tube Holder O-Ring Kit Price on request 200524 Tube Holder Tubing, 3/16" ID x 1/16" W (10 ft) Price on request 200484 Tubing, 1/4" ID x 1/16" W (3 ft), Clear Vinyl, Gil Price on request