Fully adjustable 45 elbows constructed out of the same mirror finish material as the Light Pipes. Since the pitched flashing is fixed at about a 4 and 12 pitch, elbows must be used if the roof pitch is 6 and 12 or steeper, or in applications where straight pipe runs are not possible. Two 45 elbows are often used to offset the dome light pipe horizontally from the diffuser light pipe, allowing both ends to remain perfectly verticle. Note: Each time light is bent there is a loss of light, therefore, minimal use of elbows is recommended.