Aqua Lung Omni Back AssemblyThe Aqua Lung Omni Back Assembly also includes Aqua Lungs GripLock Tank Band. This band is a strong, secure way to attach the cylinder to the BC. Gone are the days of complicated web weaving through multi slot buckles. Predetermined settings make set up simple. No adjustments are necessary when switching cylinders of the same diameter. Best of all, you don't have to worry about pinching your fingers with the GripLock innovative finger saver feature.