GIS/E20 bags have been special designed for working in conjunction with the ALH IRIS stop equipment as the secondary or safety bag.

There are 2 designs, with or without a centre back bone, the newer design with the central back bone works in conjunction with the ALH Systems 3 Bagtube and a low pressure stop off or the secondary Iris position and insertion is gas free.

All bags are designed with a safety factor on burst of 4 time max inflation pressure.