Staedtlers Mars high break resistant due to flexible micro carbon lead. Smooth-gliding lead for use with mechanical pencils on paper or drawing cards. Produces jet black lines. Automatic lead dispenser features an innovative push-button mechanism with funnel-shaped tip for easy single-handed refilling of mechanical pencils with individual leads. Softening agent free. Contains natural raw materials. General Information Manufacturer:Staedtler Inc.Manufacturer Part Number:250 07-HBManufacturer Website Address:http://www.staedtler.comBrand Name:StaedtlerProduct Model:250 07-HBProduct Name:Mars Micro Carbon Mechanical Pencil LeadMarketing Information:Automatic lead dispenser features an innovative push-button mechanism with funnel-shaped tip for easy single-handed refilling of mechanical pencils with individual leads. Softening agent free. Contains natural raw materials. Packaged Quantity:12 / BoxProduct Type:Pencil Refill Product Information Lead Diameter:0.7 mm (0.03")Lead Color:Graphite BlackCompatibility:Staedtler Mechanical Pencil Mars Micro Physical Characteristics Height:0.24" (6.10 mm)Width:0.39" (9.91 mm)Length:3.54" (89.92 mm)Weight (Approximate):0.16 oz (4.54 g) Miscellaneous Additional Information: Smooth-gliding lead Jet black lines Highly flexible - extremely break-resistant Easy to erase Recycled:YesRecycled Content:80%Assembly Required:NoCountry of Origin:Germany Product Numbers: 250 07-HB 007817213889 STD21388 243436 STD250-07-HB STD25007HB 4007817213896