HomeSaver 8″ Inverted 304 Alloy Cone Cap – 3/4 Mesh Made of 304 alloy stainless steel this cap features an inverted cone underneath its lid to direct creosote back down the flue rather than on the roof. The 3/4 ” mesh is removable. Features: Material: 304 Alloy Stainless Steel. Specifications: Overall Dimensions: 8″ (L). 0.62″ Mesh.