All Style Retro-Split E.P.D.M. Rubber Storm Collar Flashing with a 0.840 in. O.D. Hole for 1/2 in. NPS Conduit Pipe 702840 - The Home Depot
All Style Industries 1/2 inch Double All Style Small 2-Hole STD-Storm Collar Flashing; with Two (2) 1/2 in. Diameter Supply/Return Conduit Pipe Nipples in the Vent Pipe Flashing department at Lowes.com
Clamp Umbrella Storm Collar for Roof Pipe Penetrations in Stainless Steel
Flashing of Penetrations in Existing Roofs | Building America Solution Center
7" Selkirk SuperVent Flashing with 0/12 - 6/12 Pitch includes Storm Collar - JSC7AAF - Walmart.com
SBC Umbrella Flashing w/Clamp, Fits 4 inch Pipe, Stainless Steel
All Style Industries, LLC All Style Medium Standard STD-Storm Pipe Flashing Collar, Fits Nominal Pipe Size 3 in. Dia (3.5 in. O.D.) Round Pipe 701162 - The Home Depot
Commercial Retro-Split™ Storm Collars - All Style Industries
Large Pipe Flashing / Storm Collar, 4 inch (4.5 ID)
Gibraltar Building Products 1-1/4 in. x 3 in. Galvanized Steel Adjustable Pipe Flashing with Base and Rubber Collar 3-1RJ - The Home Depot
All Style Industries Five Inch All Style Medium Standard STD-Storm Collar Flashing for 5 in. Diameter (5.563 in O.D.) Round Pipe in the Vent Pipe Flashing department at Lowes.com
All Style Industries Four Inch All Style Medium Standard STD-Storm collar Flashing for 4 inch Diameter (4-1/2 inch O.D.) Round Pipe in the Vent Pipe Flashing department at Lowes.com
Oatey® Rain Collar For No-Calk® Roof Flashings/Multi-size | Oatey