Gas Cylinder Racks are suitable for both outdoor and indoor use, and can be used to keep helium, hydrogen, acetylene, and other various cylinders and tanks in safe storage. Specification: Material: Steel; Color: Blue; Capacity: 3 x 40 L Cylinder; Inlet Diameter: 27cm/10.6 in; Fixing Hole Diameter: 10 mm; Installation: Wall-Mounted; Use: Keep nitrogen/hydrogen/acetylene & other gas cylinders. Size: 3 Bottles - 95x20cm/37.4x7.9 in. Features: 1. Can store any 40 L gas cylinder; 2. Keeps cylinders organized and saves space; 3. Made of tough steel for long-lasting durability and safety; 4. Keeps cylinders securely upright for easy storage and transportation. Package Includes: 1 x Gas Cylinder Fixed Rack (Note: Cylinders are not included in this product). Tips: 1. Manual measurement, there will be 1-3 cm error, please understand. 2. Due to light and personal differences in color understanding, there will be NRQUll color difference, in kind prevail.