made of clear PP,11 hole sheet protector have 6,11,26,30 hole have A4,A3, ... , Letter size can be used for file pocket. 11 hole sheet protector,office stationery,file pockethave 6, 11,26,30 hole ... , and different thickness or surface. Application fields:office,school,hospital,promotional, items 1.New/High quality PP.environment-protection material.its ...