Single Tube Holder Kit, 6 x 70mm (Standard Charcoa Back Catalog number: 800149 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9964-50 Sorbent Tube, Microlite, 8X110, 500mg, 50/BX Price on request 800238 Tube Holder O-Ring Kit Price on request 800254 Single Variable Flow Kit, 5 x 150mm [Kitagawa TWA Price on request