Single Variable Flow Kit, 6 x 70mm (Standard Charc Back Catalog number: 800253 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800251 Tube Holder Kit, Dual Variable Manifold (Includes Price on request 800262 Single Tube Holder Kit, 7 x 130mm [Draeger Long T Price on request F-PRO-1218 Universal Tube Holder System - Instruction Manual Price on request