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 801935 Charcoal Tube, Coconut Shell, Standard, 50/100mg, Price on request 811-9980-50 Sorbent Tube, XAD-7, 6X70, 60/30, 50/BX Price on request 800136-10 Tube Holder Collar Clip, for 5/8" OD, 1/2" ID Tubi Price on request