Double the thickness. Double the protection. CURV Sleeves HARD INNERS are the perfect partner for CURV Sleeves when youre sleeving your most valuable decks. 100 Sleeves, Standard Size (63mm x 88mm), 100 Microns // Twice as Thick, Optimized for CURV Sleeves, Contoured Bottom Corners, Easier to Double Sleeve, Optically Clear Clear Gloss Front Back, Acid-Free PVC-Free.