3 inches plastic plug CHARACTERISTICS a. Good Strength b. Smooth Surface Appearance c. High Cleanliness d. Low Shrinkage e. Reusable APPLICATIONS a. High protective film winding. c. Solar back winding. d. Film turnover tube. e. Chemical corrosion transmission tube. Shanghai Aoxiao is specialized in produce Injection Plastic Plugsï¼?Our Film turnover tube cores are very popular, if you are interested in our products, please contact us as soon as possible.