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 800134-10 Tube Holder Collar Clip, for 7/16" OD, 5/16" ID Tubing (Packg of 10) Price on request 800073 Tube Holder Dual Variable Flow, only Price on request 800681-1 Tube Breaker Kit, Black, LFS-113 Price on request