GS1 Slim Line Highway Peg SetMade in Ohio, the Slim Line GS1 Set is an update to our original design. Instead of stainless steel collars, this set uses aluminum collars. The peg and collar are now all anodized aluminum, with stainless steel fasteners. This allows us to make the outside diameter of the collar smaller, and we use anodizing, instead of the more expensive Cerakote process, on the black set. The collar is now longer, as well, giving it more area to grip the crash bar.