Shandong Bittersweet Marketing Co., Ltd, located in Qingdao, established in 2005, is specialized in supplying OEM casting products. We export a wide range of products but our main business is gratings, cover & frame, valves. We have been exporting to some famous clients in Europe market for many years. Our foundry, taking an area of 5300 square meters with 650 employees including 50 technicians, owns two ZZ416B vertical parting flaskless shoot-squeeze moulding machines,resin sand production line, shell core machine,five shot blasting machine, immersive air/oven dry painting line and spray line. The main test equipment include: chemical analysis laboratory, optical spectrometer, metallographic microscope, universal physical testing machine, Brinell hardness tester and pressure test machine. Besides the 50 technicians from our foundry we have a professional and experienced engineer team in addition, who works in this area for many years and would always double check the quality of the products before every delivery to assure our customer the high-quality products. Our other products are : flange,Pilona,flower bowl,bench foot,autoparts,rubber seal, etc. If you are interested in our products or you have any enquiries please do not hesitate to contact us. Any samples or drawings will help to meet your special request. We will give you feedback professionally and efficiently.