https://alexnld.com/product/3-pcs-school-office-extra-fine-titanium-alloy-nib-transparent-piston-fountain-pen-yellow-random-delivery-0-5mm-0-38mm-nib/?hilite="3 PCS 2B Pencil Lead Refill Automatic Pencil Rod Refills Stationery for Office School (Random Color) (0.7mm 2B Pencil Lead)"