The largest VentSaver model, recommend for extreme snow conditions. The VentSaver HD Series is made from non-corrosive, powder-coated aircraft grade aluminum, and stainless-steel aircraft cable. Also provided are stainless steel nuts, bolts and heavy duty 1 1/2" lag screws. The HD Series will fit any roof pitch and an array of pipe sizes from 1" to 14" around with the included 46-inch-long stainless cable. The fin has a 14" standing profile that is designed to protect taller roof stacks, chimneys, gas vents and masts. The included wing kit my not fit all metal roof panel applications.