Sorbent Tube, XAD-2, 8X110, 400/200, 50/BX Back Catalog number: 811-9975-50 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 400253 Tube Holder, Clear Storage Box Price on request 106SC Carbon Monoxide 1-50 ppm Gas Detector Tube, pk/10 Price on request 811-9902-20 Charcoal Tube, Coconut Shell, Large, 200/400mg, 8x110mm, with end caps, 20Pack Price on request