Prat Cristal Laser 501 - refill book with polypropylene sheet-protectors - whit black paper insert

— Spiral book of 20, 30 Cristal laser spiral bound sheetprotectors with luxury black paper insert
— 2 black protective semi-rigid polypropylene sheets on front and back of the set
— Super clear
— Made out of non-stick polypropylene
— Acid-free and archival quality, the sleeves have passed the Photographic Activity Test
— Can be used as a refill for 142 or alone as a presentation binder