The Peterbilt 2005 And Newer Door Top Cap is a practical and reliable accessory for your Peterbilt truck. Made of stainless steel, it is designed specifically for 1.9M caps with cab mounted mirrors. The cap is dimpled and sold in pairs, attaching easily with the supplied 3M two-sided tape. It fits most Peterbilt 2005 and newer makes and models, but please note that it is not compatible with passenger door look down mirrors or 387, 587, or 589 models. This door top cap is a durable and functional addition to your truck.