A to D (Pentel EnerGize): Lead size: 0.5mm Length: 150mm Diameter: 10mm Weight: 12.5g Made in Japan E: Lead size: 0.5mm Length: 140mm Diameter: 10mm Weight: around 9.5g Made by Square Japan Made in Japan Pentel Energize 0.5mm Mechanical Pencil The Bears’ School Jackie Japan