Dektite #5 Red Silicone Metal Roof Pipe Flashing, Round Base, Pipe OD 4-1/4" - 7-1/2" Fits 4-1/4" to 7-1/2" outside pipe diameter. Base diameter is 10-3/4". Continuous service temperature ranges of -58F to 392F (Silicone). Will not crack or break. Flexible aluminum collar.