There are 250 pieces in 1 package of A4 Paper 210x297 for Clean Room. Recycleable. Clean paper is specially designed for writing, printing and copier in clean room environment. The pit polymerization process binds the lint and particles tightly together. This will reduce electro-static build-up and eventually minimize its rate. A4 size. Double packaging in a clean room environment. Ultra-low particle generation, extractable chemicals and metallic ion content. High opacity and durability. High tear and tensile strength Smooth feeding and superior toner adhesion in laser printers and ppc copies.