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 811-9966-50 Sorbent Tube, Silica Gel, 6X70, 100/50, 50/BX Price on request 800066 Tube Holder Collar Clip, for 1/4" OD, 1/8" ID Tubi Price on request 800260 Single Tube Holder Kit, 7-10 x 150mm Price on request