S = 1-Piece Pack (Single Color) M = 3-Piece Pack (Assorted Colors). Crafted from aircraft-grade aluminum and finished with an anodizing process, this bookmark is exceptionally sturdy, durable, and completely fade-resistant. Its design is exquisite and refined, featuring neat, intricate engraved patterns that help keep your books organized and tidy. Thanks to its slightly flexible U-shaped structure, it slides smoothly and effortlessly onto or off book pages-securing firmly in place without ever damaging the book. Measuring just 1 millimeter in thickness, it is remarkably space-efficient, while its vibrant colors make your books easy to identify. An ideal choice for readers and artists alike, it is also perfect for clipping documents and various other materials. Weight: 0.242 lbs.