.pheader-product-m {
    background-image: url(/Content/assets/images/page-header/pheader-products.jpg);
}
.pheader-aboutuss-m {
    background-image: url(/Content/assets/images/page-header/pheader-aboutuss.jpg);
}
.pheader-contact-m {
    background-image: url(/Content/assets/images/page-header/pheader-contactt.jpg);
}