File:A container of 0.50 milimeter polymer mechanical pencil leads 20230315 184725.jpg - Wikipedia
Nipro 1.3 mm Mechanical Pencil with Lead Refill, Eraser - Weatherproof Heavy Duty Barrel, Great Balance Carpenter Pencil for Outdoor Marking Drafting Drawing Sketching Woodworking - with Pencil Case : Amazon.co.uk: Stationery