Master Flow 6 in. Storm Collar SMC6 - The Home Depot
150mm Black Storm Collar – Roof Flashings from Flue Supplies UK
Chimney Pipe / Venting Pipe :: Gas Piping :: 10 inch :: Selkirk Model R Type B Gas Vent 10 :: Selkirk 10" Model R Adjustable Storm Collar - 2003628 - 10RSC-S
DTW Storm collar (required only if roof flashing does not seal to pipe - Stovefitter's Warehouse
Storm Collars — SC 10″ – 24″ – ECCO Manufacturing
ESC/RSC/SC - Storm Collar
United States HDW/U S HA Galvanized Storm Collar, 8" : Amazon.ca: Tools & Home Improvement