First, it does not work as another reviewer suggested. I contacted pallet network and there was nothing to track, because Gravelmaster had not delivered! We ordered a bag of stones several weeks ago. Got a delivery date, when nothing arrived. Got a new date, and same thing happen. And so it go on and on. No reply to several emails. Nobody answer the phone. After many tries we had a email saying within 5 days, which also was a lie! We wrote a polite letter giving them time to react before we reported them to trading standards, coronavirus business complaint, police etc. But still silence. They delete bad reviews on Trust pilot , and seem to have got a lot of fake good invited reviews lately. With all who are in same situation as us, it is quite clear they get someone to write the good ones. I believe it is a scam company, and people should use social media to warn people. We will now do what we have to, to get our money back