#resImage_121 {
    display:block;
    overflow:hidden;
    background-image:url('https://www.conveyorrollers.co.uk/assets/images/f/contact-page-image-7b39a6ba.jpg');
    background-repeat:no-repeat;
    background-position:center center;
        width:100%;
    background-size: cover;
        height:380px;
}
@media screen and (min-width:700px){
    #resImage_121 {
        background-image:url('https://www.conveyorrollers.co.uk/assets/images/a/contact-page-image-60253cb2.jpg');
                height:390px;
    }
}
@media screen and (min-width:980px){
    #resImage_121 {
        background-image:url('https://www.conveyorrollers.co.uk/assets/images/a/contact-page-image-587829ed.jpg');
                height:390px;
    }
}
@media screen and (min-width:1400px){
    #resImage_121 {
        background-image:url('https://www.conveyorrollers.co.uk/assets/images/2/contact-page-image-66f5e615.jpg');
                height:390px;
    }
}