The Prat Cristal Laser Sheet Protector is a professional-quality hole-punched sleeve measuring 21cm x 30cm, designed to fit Prats Pampa range of spiral books. Sold in a pack of 10, they’re made from super-clear, non-stick polypropylene, which is acid-free & passes the Photographic Activity Test so you can be confident they’re a safe way to protect & archive your work. Prat Cristal Laser Sheet Protectors are available in A3 & A4 size.