S = 50 pieces M = 120 pieces. Premium Material: Crafted from high-quality aluminum alloy, these bookmarks are lightweight, feature a smooth surface, and offer a comfortable tactile feel. They are highly suitable for sublimation printing and are resistant to fading. Diy Creativity: These bookmarks are designed for single-sided sublimation printing you can either hand-draw your own designs directly onto the surface or utilize sublimation technology to print a wide variety of patterns. Production and Usage: For image transfer, please apply heat at a temperature of 190-200degree(s)C (374-392degree(s)F) for 50-60 seconds. Be sure to remove the protective film from the surface before use. Supports single-sided printing only. Ideal Occasions: Perfect as gifts for birthdays, the start of the school year, graduations, Christmas, Valentine's Day, Mother's Day, Father's Day, and other special holidays. Weight: 0.814 lbs.