These mechanical pencil lead refills are compatible with a wide range of automatic pencils, providing versatility and convenience. The HB grade ensures a balanced hardness, ideal for both writing and drawing. Whether you're working on architectural plans or school assignments, these refills deliver consistent performance. Features -Color:Black -Material:Resin, plastic -Size:6.00X0.03X0.03cm/2.36X0.01X0.01in - : these automatic pencil lead refills ensure a seamless writing experience, making them a convenient choice for any setting. -Multipurpose: ideal for a range of writing tasks, including notetaking, letter writing, and more, suitable for office, school, and home use. -Fits most pencils: the universal size of these refills makes them compatible with the majority of mechanical pencils. -Secure storage: the sturdy plastic box with a blue lid is designed for easy access and secure storage of the leads. -Resin composition: made from Excellent resin, these leads offer smooth, clear writing that lasts, with a black color that doesn't fade Package list: 20 x boxes of automatic pencil refills (12pcs/box)