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 800062-10 Tube Holder Housing End, 1/2" for 6mm OD (Packg of Price on request 800149 Single Tube Holder Kit, 6 x 70mm (Standard Charcoa Price on request 800263 Single Tube Holder Kit, 5 x 150mm [Kitagawa TWA Tu Price on request