Deardruid, Hello , this is Kim from Shenzhen Kaiyuan New Energy Technology Co., Ltd.. Our company is a professional DC contactor manufacturer with years 's experience .So we want to avail ourselves of opportunity establishhing business relation ship with you . E-catalogue wil be sent if needed. Best regards Kim Shenzhen Kaiyuan New Energy Technology Co., Ltd. Tel/WhatsApp：+8613519821890 Skype:kim031537