Introducing our new Spark Arrestor for Selkirk's Ultra-Temp (UT), UltimateONE (U1) and Sentinel (CF) chimney models. . Our new pre-formed Spark Arrestor is much easier to install; there is no assembly required. The new design allows for the Spark Arrestor to slip over the dome of the CT/RT Round Top. This new Spark Arrestor will fit all CT/RT Round Tops. . Corrosion resistant Stainless Steel . Easier and quicker to install and removal for inspection and cleaning . Fits over exterior of chimney top . Fits all CT Round Tops