Diamond Dome Sunpipe 530mm/21" 2 - Section Adjustable 30dg Elbow A vital part of the 530mm Diamond Dome Sunpipe system, the Diamond Dome adjustable elbow allows you to work more flexibility in your sunpipe design. able to adjust to a maximum of 30dgs, the 2 section adjustable sunpipe elbow allows extra flexibility and manipulation over the direction of natural light to your desired room. Able to be used in conjunction with other sunpipe elbows the possibilities are endless.