KINGSON POF FILM is 3 layers,and environmental protection,it has get SGS FDA certificate with thickness is from 12mic to 35mic. KINGSON is specialized in manufacturing POF shrink film with thickness from 12mic to 35mic, we also produce biodegradable POF shrink film.all film have obtained SGS FDA certificate,and most of them export for many years,its fine quality have obtained a good reputation among our clients.meantime,we can also manufacture the relative film blowing machinery.more details,pls contact us