Ideal Products’ Aluminum Numbered WeatherJacs® are produced from 1100 series aluminum, .024” in thickness, meeting ASTM C-585 standards. All of our aluminum numbered WeatherJacs® are coated on the interior and exterior with a heat cured acrylic enamel moisture barrier. The interior covering helps provide moisture and corrosion resistance to the alloy, while the exterior clear coat helps provide protection against oxidation and corrosion, to maintain protection and finish. Our Aluminum Numbered WeatherJacs® are made from two matching halves, and when fastened together they form a precise fit every time. Each half has a plastic weather proof label attached on the inside, identifying the size number of the elbow for easy identification. Ideal offers a selection of Aluminum Numbered WeatherJacs® in both 90° and 45° angles, in sizes from #2 - #61 (for 90°) and #1 - #16 (for 45°).