Tube Holder O-Ring Kit Back Catalog number: 800238 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9972-50 Sorbent Tube, TenaX, 8X110, 100/50, 50/BX Price on request 400253 Tube Holder, Clear Storage Box Price on request 800260 Single Tube Holder Kit, 7-10 x 150mm Price on request