(30) 12" Record Divider Cards - SLOPED LESSER CUT - Black, 30mil - 12" x 13 1/8" - #12NS13BK30DI This listing is for 30 individual divider cards Reusable - Simply flip over! Easy to label with a permanent marker or affixing a label. You can even turn them upside down & reuse! 30mil Thick 12" x 13-1/8" - Slanted on One Side They're durable, and feature rounded corners to prevent jabbing yourself!