The reason for stainless steel screws is that aluminum is not strong enough and plated screws tend to rust through the plating over time. We usually have these in other colors.Black, Green, Dark Grey, Grey, Light Grey, Teal, Red, Dark Bronze/Brown, and Clear. They come with the stainless-steel screws which are installed. The coloration is uniform in the product, providing UV protection that will last significantly longer then spray paints applied to an aluminum guard. These Snow Guards are made from a Polycarbonate often used in bullet proof glass and jet plane windshields with added fiberglass making them not only more durable but also less expensive than the traditional aluminum guards. They have been tested and used for over six years with no problems. To note our product has been copied and those copies are not up to our, THE ORIGINAL PRODUCER'S, standards. Please check our feedback for more information about us. The item "20 Green Polycarbonate Snow Guard/Angel for Standing Seam Metal Roofs. Free Ship" is in sale since Wednesday, December 2, 2020. This item is in the category "Business & Industrial\Building Materials & Supplies\Other Building Materials". The seller is "77yellowvet" and is located in Greenback, Tennessee. This item can be shipped to United States.