– g-110 this cylinder bracket easily mounts to a permanent vertical surface for safe cylinder storage. It supports cylinders from 3-1/2″ to 12-1/2″ in diameter. The 1-1/2″ polypropylene strap has a steel cinch buckle. Mounting hardware is not included. Complies with osha and nfpa standards. Plastic bracket is ideal for highly corrosive environments.