Pentel - Mechanical Pencil - Graph Gear 500-0-5mm-PG515 Slim tip allows you to see lines and characters while writing. Low center of gravity design for stable writing. 4mm tip pipe for easy ruler alignment. Knurled finish prevents hand slippage. Features a window to indicate lead hardness for easy selection. Brand Name: Pentel Material: ABS Size: Barrel Diameter 10mm × Depth 8mm × Length 147mm Weight: 14g Lead Diameter: 0.5mm Material: Barrel: Recycled ABS, Tip: Brass, Grip: Brass, Clip