Sievert Pro 88 Torch Handle S3488 PRMS3488 The S3488 Pro88 handle features two control valves and trigger mechanism. The first valve opens the gas supply to enable a pilot flame to be ignited, the second valve opens the main gas supply which is operated when the trigger is pressed, and this gas is then ignited by the pilot flame, giving semi automatic ignition (known as an economiser). Perfect for roofing or large volume gas usage. PRMS3488