The Pro Armor aluminum lower door inserts are made out of .080" thick aluminum construction to save weight and ensure strength and durability for any type of riding or racing. Easy to install they directly bolt on to your Polaris RZR 900S 900XC and 1000S. Each door is CNC bent & laser cut for a precise fit and offer hemmed edges for a refined edge and more rigid panel. These bolt directly to factory half doors to complete the full door look and the stealth design adds protection and style to your RZR. 2015-2019 Models.