Good morning, I'm glad you can reply to my email. The equipment was purchased from Dongguan Huadi Company, serial number:11245.The equipment has been working very well,but Huadi's after-sales service is poor, and accessories are expensive, and some accessories are double or three times the market price. We hope you can provide me with a better maintenance company so that we can use this equipment better,please help me, thanks and have a good day.