This 4-N-1 roof flashing is designed to fit pipes of 1 1/4", 2", 3", and 4" diameters. With a larger base (12" x 16") for extra coverage, it provides added protection for your roof. The flexible PVC collar easily conforms to vent pipes, creating a reliable, water-tight seal to prevent leaks. Perfect for ensuring your roof stays secure and weatherproof, this flashing is a great solution for various pipe sizes and roofing needs.