Sorbent Tube, Microlite, 8X110, 500mg, 50/BX Back Catalog number: 811-9964-50 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800074 Tube Holder Triple Variable Flow, only Price on request 811-9969-20 Sorbent Tube, Silica, DNPH, 6X110, 300/150, 20/BX Price on request 200486 Tube Holder Tubing, 1/4" ID x 1/16" W (10 ft) Price on request