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 811-9967-50 Sorbent Tube, Silica Gel, 8X110, 300/150, 50/BX Price on request 800259 Single Tube Holder Kit, 7-10 x 110mm Price on request 800062-10 Tube Holder Housing End, 1/2" for 6mm OD (Packg of Price on request