ROT COWL 300X300 M/S (SQUARE BASE)Rotating Cowl Mild Steel Complete SKU: 40181516 Jetmaster Rotating cowl Additional information Accessories Cowl, Rotating Cowl Material Mild Steel Description Our cowls are generally fitted to the top of a flue pipe or bricked chimney. Its primary job is to increase the draw of smoke and combustion gasses. It also prevents downdrafts, birds from nesting and other elements such as rain from entering the flue or chimney and potentially causing any