Features: This Infinity pencil replacement refill is made of quality material, strong and not easy to break, provides smooth writing and is easy to erase. It is designed with a screw interface for easy disassembly and replacement. The interchangeable tip of the universal inkless pencil is convenient to use, helping you write, draw, create detailed illustrations and shading, add texture, and more. These black inkless replaceable nibs are odorless and safe to use, making them a great choice for students, teachers, and artists. Ideal for everyday use at school, office, or home. Package includes 30 pieces of everlasting pencil replacement heads, sufficient for daily study, office work, drawing, and replacement needs. Can be shared with family and friends. These inkless pen replacement nibs are practical accessories for study and office, widely used for writing, drawing, note-taking, journaling, scrapbooking, and other creative projects. Specifications: Quantity: 30 Pieces Material: Brass Type: Style 1; Style 2; Style 3; Style 4 Size: Approx. 1.5cm / 0.59in Weight: Approx. 16g Package Includes: 30 Pieces Inkless Pencil Refills Note: 1. Please allow 0–1 cm error due to manual measurement. Ensure you are comfortable with this before purchasing. 2. Due to differences in monitor displays, the image may not reflect the actual color of the item. Thank you.