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 811-9965-50 Sorbent Tube, Silica Gel, 6X70, 150/75, 50/BX Price on request 200187 Tube Holder Adapter, 3/16" to 1/4" Ends Price on request 800071-10 Tube Holder Housing End, 5/8", for 1/4" OD, Open E Price on request