Brand: Amazon
"0.9mm Smooth Break Resistant Leads
Durable Resin Construction: Made from Quality Resin for Sturdy and Smooth Writing
Fits Most Mechanical Pencils: Refills Fit Perfectly and Don't Fall Out
Convenient Storage Box: Small Hard Plastic Box with Easy Access for Refills
General Writing Use: Suitable for Notes, Letters, Office, Classroom, Home and More"