Sanhai Plastic Co., Ltd. is a manufacturer and trading company based in Shenzhen, China, specializing in rubber processing, mould design, and finished plastic products manufacturing. Established in 2006, the company employs over 120 people and operates with more than 20 machines. They offer a diverse range of products including rubber and plastic components, electronic products, mouse wheels, rubber feet, oil seals, gear wheels, belts, sealing products, ear muffs, keystrokes, airtight joints, and water tight joints. Sanhai Plastic Co., Ltd. also provides mould design services and holds ISO 9001 certification, demonstrating a commitment to quality management. They are also a contract manufacturer and have developed patented products and registered the "KaiQiRui" trademark.