Tube Holder Kit, Quad Variable, 6 x 70mm Back Catalog number: 800231 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 800062-10 Tube Holder Housing End, 1/2" for 6mm OD (Packg of Price on request 800138 Tube Holder Adapter for 5/8" Ends Price on request