Single Tube Holder Kit, 6 x 70mm (Standard Charcoa Back Catalog number: 800149 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9988-10 Sorbent Tube, Chromosorb-106, 10X150, 600/300, 10/ Price on request 200113 Tube Holder Housing, 7-10 x 110mm, 5/8", L240 Price on request 800064-10 Tube Holder Housing End, 5/8", for 7-10mm (Packg o Price on request