Peterbilt 379 Aluminum Batt Box Bottom Replacement Step. Aluminum Diamond Plate Step. Fits Peterbilt 379 Battery Boxes. Strong, tough and well built. Size:748mm(L)X367mm(W)X2mm(T). Items post from USA. Items unpaid within this time. We guarantee for every customer with best quality and service – Please leave feedback for us after you received the item, for informing us that you have received the item. Thank you for your cooperation.