#resImage_91 {
    display:block;
    overflow:hidden;
    background-image:url('https://www.conveyorrollers.co.uk/assets/images/9/belt-conveyor-roller-58d398f7.jpg');
    background-repeat:no-repeat;
    background-position:center center;
        width:100%;
    background-size: cover;
        height:380px;
}
@media screen and (min-width:700px){
    #resImage_91 {
        background-image:url('https://www.conveyorrollers.co.uk/assets/images/d/belt-conveyor-roller-22897907.jpg');
                height:300px;
    }
}
@media screen and (min-width:980px){
    #resImage_91 {
        background-image:url('https://www.conveyorrollers.co.uk/assets/images/f/belt-conveyor-roller-cb0e6716.jpg');
                height:580px;
    }
}
@media screen and (min-width:1400px){
    #resImage_91 {
        background-image:url('https://www.conveyorrollers.co.uk/assets/images/d/belt-conveyor-roller-c48ea1b0.jpg');
                height:580px;
    }
}