"Our SxS A-Arm Protectors offer the ideal underbody protection for your ride and an edgy and aggressive look. That's right: look no further than our side-by-side arm protectors with plastic deflectors for ultimate durability and strength. Plastic deflectors keep you riding longer and farther. Materials & Construction For ultimate durability and strength all our Aluminum Skid Plates are made with High Strength 5052 H32 Aluminum 3/16"" (4.5 mm) thick. Aluminum A-arm plates and plastic deflectors provide essential protection and aggressive look. Included Sold in pairs."