.single_image_section .single_images img{
  width:100%;
  height:100%;
  display:block;
}
.single_image_section .single_images img.desktop_image{
  display:block;
}
.single_image_section .single_images img.mobile_image{
  display:none;
}
@media screen and (max-width: 749px) {
  .single_image_section .single_images img.desktop_image{
    display:none;
  }
  .single_image_section .single_images img.mobile_image{
    display:block;
  }
}