The witches hat vent has a seamless top, preventing water and snow entry. The internal louvers prevent insects, rodents or birds from entering. The witches hat ventilates the attic by letting out hot air in the summer and moisture in the winter, and is ideal for flat or low sloped roofs. The detachable head allows for easy installation on EPDM, PVC, TPO and other roof membranes. Constructed of heavy gauge, rust free aluminum.