Dear Sir, We are a professional manufacturer focusing on door-closer equipment in Taiwan. We just release a new product which is better than traditional hydraulic door closer in structure and looks. We want to co-work with some channel/dealer . if you are interested in this product or market, i wish hear from you and look forward the coporation in the future. we are confident about your product and skills. the attachment is detail specification about the product. if you have any question, please feel free to contact with us.my email: thanks and best regardsKuta Yu.