Sorbent Tube, Microlite, 6X70, 200mg, 50/BX Back Catalog number: 811-9963-50 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800071 Tube Holder Housing End, 5/8", for 1/4" OD, Open E Price on request 811-9981-50 Sorbent Tube, Porapak-N, 6X70, 88/44, 50/BX Price on request 800142-10 Tube Holder Collar Clip, for 3/8" OD, 1/4" ID Tubi Price on request