The Exacompta Punched pockets are made from 0.14mm polypropylene. The pockets are A4 Maxi, 24in size and can hold A4 and larger documents. The punched pockets have a top opener and a pre punched tab on the left hand side so they can be inserted into a file or folder. Each punched pocket can hold up to 30 sheets. Heavy gauge acid free black paper, ready to mount work. Comes in a pack of 10