The 55mm standard bottle mouth diameter 5-gallon PET preforms are specially designed for the semi-automatic/fully automatic bottle blowing production line of the water plant. They are made of high-quality food-grade PET raw materials, with customizable colors, and provide multiple gears of precise weight flexibility and high-speed and stable blow molding; The standardized 55mm bottle mouth diameter is seamlessly compatible with mainstream screw capping/capping equipment, significantly improving the efficiency of the production line. It supports customization of bottle body LOGO and patterns (minimum order of 2,000 pieces), and with a weekly production capacity of 100,000 pieces + 7-day fast delivery system, it provides bottled water companies with highly compatible, low-loss, and highly stable preform solutions.