Crystal Foil Back Assortment by PERRIN Sale $39.90 | / SKU 67-41799 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Notify me when back in stock Email address Email me when available Crystal Foil Back Assortment an assortment of 144 pieces of 12 sizes. This assortment provides 12 each of 1.1mm, 1.25mm, 1.50mm, 1.75mm, 2mm, 2.25mm, 2.5mm, 3mm, 3.75mm, 4mm, 4.5mm and 5.25mm.