Soft flame design ideal for cable work & other heat shrinking applications. Soft flame burners with sweeping, powerful yellow & blue soot-free windproof flames. Fresh air sucksin & keeps the burner head cold to minimize the risk of burning the shrinking material. To heat the sleeves efficiently but still soft enough not to overheat the shrink material. For direct connection to Sievert PRO handles. Working pressure 2 Bar.