Pentel Graph Gear 1000 Mechanical Silver Pencil, PG1017, 0.7mm,

Size/weight: Shaft diameter 10mm x depth 9mm x length 150mm / 20g Core diameter: 0.7mm Material: Shaft: Aluminum, Knock: Stainless steel, Clip: Iron, Tip: Brass, Grip: Silicone rubber, Brass Lead hardness display window included Replacement eraser product name: Z2-1N