Tube Holder Housing End, 5/8", for 1/4" OD, Open E Back Catalog number: 800071 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800149 Single Tube Holder Kit, 6 x 70mm (Standard Charcoa Price on request 200187 Tube Holder Adapter, 3/16" to 1/4" Ends Price on request 800139 Tube Holder Adapter for 1/2" Ends Price on request