Facebook share The showing image is not the image set in og:image -

in pdp(product display page),i set og:image product image,however,in share facebook page,the sharing img not expected in og:image don't know why have tried url:h ttp://www.halfords.com/cycling/helmets/kids-helmets/halfords-boys-bike-helmet-50-54cm in facebook debug page:h ttps://developers.facebook.com/tools/debug/og/object/ below screenshot in facebook debug page. green arrow pointed expected,however,it shows red arrow pointed

thanks kind guy give me suggestion.

make sure web page you're developing isn't tested/located on local server (like wamp/mamp etc.). facebook might not every property right. try testing live.