We offer a full customization of cones made from 60-mil TPO or PVC that are compatible with all membrane manufacturers' roofing systems. Cones range in size from a minimum 1/4-inch to 25"+-inch top diameters, with bottom diameters ranging upto 48"+ inches. Heights vary , and offered in either a square or round base, so no matter your need, we’ve got a cone that fits the bill.  So if you need a custom flashing created get started here. 

Don't forget the clamp(s)

Custom Cones - Made to Order Roof Flashings