Sorbent Tube, Porapak-N, 6X70, 88/44, 50/BX Back Catalog number: 811-9981-50 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800071 Tube Holder Housing End, 5/8", for 1/4" OD, Open End Price on request 800064 Tube Holder Housing End, 5/8", for 7-10mm Price on request 800073 Tube Holder Dual Variable Flow, only Price on request