Abundant quantity: this set has 6 tubes of mechanical pencil refills, 30 pack per tube, total 180 pack pencil lead refills Standard size: 0.5mm HB and 0.7 mm HB refill is about 60 mm long, works with 0.5mm and 0.7 mm lead mechanical pencil, can be scanned like 2B pencil Quality material: the lead refill is made of good quality resin, durable and resists breaking Writes well: good workmanship and quality manufacturing allow for smooth, clear and long lasting writing Lead refill container: the container is designed as a small bottle that looked very cool, the convenient simplicity design resulting in effortless dispensing Reliable Resin MaterialQuality manufacturing allows for uniform, smooth, and long lasting writing. Resists BreakingNever needs sharpening and produces a clear, dark line. Writes SmoothlyRefill lead for 0.5mm/0.7mm mechanical pencils. Translucent Barrel DesignCompact lightweight, identify the lead refills easily, convenient and practical.