Qingdao Ristarch is an experienced diesel heater and electric heater manufacturer over 13years,we have obtained CE/GS/ISO9001 certificates,we have our own brand Ristarch and also accept OEM production,we are seeking for partners now,if you are interested in such product,don't hesitate to contact us. Email:martin.huang@ristarch.com Skype/Phone:+86-13884635096 Wechat:Wechat_Martin QQ:1661903282 Website:www.ristarch.com