Single Variable Flow Kit, 6 x 70mm (Standard Charc Back Catalog number: 800253 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9975-50 Sorbent Tube, XAD-2, 8X110, 400/200, 50/BX Price on request 800142-10 Tube Holder Collar Clip, for 3/8" OD, 1/4" ID Tubi Price on request 800230 Triple Variable Tube Holder Kit, 6 x 70mm Price on request