Good day to you! we are wen zhou heng zheng mechanical seal manufacturer in china,we would like to introduce our company and products to you sincerely. as a leading seal manufacturer in china,we would design and manufacture different kinds of mechanical seals for pumps,including water pump seal,industrial pump seal,chemical pump seal,auto cooling pump seal,auto water pump seal,o-ring seal,rubber bellow seal,and other mechanical seal. we could promise you our price is very competitive and the quality is high,however our factory is not the biggest in china.because we are real manufacturer, we are the source.if you like,please don`t hesitate to contact us. thanks and regards