This 1 1/2" ID wall port comes with a 90 degree elbow on one end of the unit to help keep weather out of the unit. With a wall thickness range of between 4" to 6", this unit fits most standard 2 x 4 walls, allowing the running of cables, cords, hoses, etc... through the unit, effortlessly, while maintaining an aesthetically pleasing look. This unit creates a pass through completely through a wall or other barrier.