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 200524 Tube Holder Tubing, 3/16" ID x 1/16" W (10 ft) Price on request 811-9974-50 Sorbent Tube, XAD-2, 8X110, 150/75, 50/BX Price on request 800075 Tube Holder Quad Variable Flow, only Price on request