Which of the following is a characteristic of high pressure air bags?

High pressure air bags are designed to provide significant lifting capability, which is reflected in their higher maximum lift compared to low pressure air bags. This characteristic makes them particularly valuable in situations that require lifting heavier loads or navigating challenging terrain. The engineering behind high pressure air bags allows them to achieve this lift while maintaining a smaller footprint, which can be advantageous for various lifting and transportation tasks.

The aspect of being lighter, mentioned in one of the options, generally applies more to low pressure air bags, which prioritize weight reduction over lift capacity. High pressure air bags are not necessarily unsuitable for stacking; this is often determined by the application and configuration rather than an innate characteristic of the bags themselves. Lastly, while air bags can be used on various surfaces, there is no strict limitation confining them to flat surfaces only, as they can adapt to uneven terrain based on their design and inflation.