The Hyunpoong Transparent Frontier Ring File is an office stationery item that can neatly organize up to 60 sheets of A4-sized documents. Using transparent material, it allows for easy identification of internal contents, and the sturdy ring structure makes it simple to insert or remove documents. It is ideal for storing and classifying materials in schools, academies, and offices. As a domestic product with stable quality, please inquire separately regarding custom production such as printing for bulk orders.