Tube Holder Dual Variable Flow, only Back Catalog number: 800073 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800063 Tube Holder Housing End, 1/2" for 5mm OD Price on request 800497-1 Tube Breaker Kit, Blue, LFS-113 Price on request 800253 Single Variable Flow Kit, 6 x 70mm (Standard Charcoal Tube) Price on request