The difference is that the Strike Fx 1kg powder extinguisher uses a special polymer tubing to direct the powder to the source of the fire.
Hard to reach areas in an engine bay or server cabinet where you cannot get an extinguisher in close can now be covered with the polymer tubing and being 4m long there is plenty to cover most sized areas. When a fire is detected only the part of the tubing near the heat will break pushing the powder out towards the fire.
Please Note that due to the nature of these products, the Strike FX Automatic Fire Extinguishers are made to order and are not available on our standard next working day delivery service. Delivery may take up to three weeks.