.popup-grades-paint .popup-grades-wrapper .grades-right .swiper .swiper-slide:nth-child(1n) {
    background-image: url('/images/Paint&CoatingAdditives/Non-IonicSurfactants(PEGs).jpg');
    background-repeat: no-repeat;
    background-size: cover;
}

.popup-grades-paint .popup-grades-wrapper .grades-right .swiper .swiper-slide:nth-child(2n) {
    background-image: url('/images/Paint&CoatingAdditives/Polysorbates.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}

.popup-grades-paint .popup-grades-wrapper .grades-right .swiper .swiper-slide:nth-child(3n) {
    background-image: url('/images/Paint&CoatingAdditives/PEGEsters.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}


.popup-grades-paint .popup-grades-wrapper .grades-right .swiper .swiper-slide:nth-child(4n) {
    background-image: url('/images/Paint&CoatingAdditives/HydrogenatedCastorOil(HCO).jpg');
    background-repeat: no-repeat;
    background-size: cover;
}