Magnum 2.5 Series Bed Rails feature:

6061-T4 Aluminum, the 2.5-inch round tube is bent on the ends by a Drawn-Over-Mandrel (DOM) process for a consistent and evenly formed radius and the .130 wall thickness offered superior strength without the weight of mild steel or stainless steel. The Aluminum tube is treated with a corrosion resistant electrostatic E-coat before it’s powdercoated and even anodized on the brushed finish for protection from the most extreme weather and road conditions. Each set of bed rails is manufactured to the rigid standards as set forward in our certified ISO 14001 and TS-16949 facility; therefore, they meet or exceed the OEM product standards. A no-drill installation.

Brushed & Anodized: Its machined-brushed surface combined with a strong durable anodized coating gives it an attractive alternative to chrome without the higher price of chrome.
Textured Black Powdercoat: Each aluminum tube is E-coated, and then a durable textured black powdercoated finish is applied for a surface that is extremely resistant to the harsh elements of weathering.
Chrome-plated: Each aluminum tube is machine-polished before receiving a bright triple-nickel chrome-plated surface for an automotive mirror-like finish.
Satin Silver Metallic Powdercoat: Each aluminum tube is E-coated, then applied with Satin Silver Metallic (WA-345M) Powdercoat finish and finished with a clearcoat for a rock-hard surface that will stand up the toughest weather conditions.