ROPP preforms are PET preforms that are used in manufacturing PET bottles for pharmaceutical applications.ROPP preforms are PET preforms that are used in manufacturing PET bottles for pharmaceutical applications. PET Preforms are an excellent way of manufacturing PET bottles quickly. ROPP preforms are PET preforms that are used in manufacturing PET bottles for pharmaceutical applications. They have a neck diameter of 28MM. ROPP bottles have a Roll-on cap that can be applied automatically in an assembly line
