Dear manager， This is Kim from Shenzhen Kaiyuan New Energy Technology Co., Ltd..We are a professional manufacturer and designer high voltage DC contactor in China. Our products have been CCC,CE,RoHS,UL certified and get a high reputation and hot market in Europe ,North America,and other Aisia countries. Pls feel free to contact with me if you would like to know more ! Best regards Kim Shenzhen Kaiyuan New Energy Technology Co., Ltd. Tel/WhatsApp：+8613519821890 Skype:kim031537