Caran d'Ache Ballpoint 849 Metal Fluo Series Green Brass Sport Push Pencil These are thin and flexible

These are thin and flexible for various line thicknesses

Regarding fountain pens

The Pelikan Classic M200 Special Edition Fountain Pen Set - Golden Lapis  features a stunning blue color with a captivating golden shimmer

The three-dimensional colors and blurring produced by the wooden blocks are unique to block printing and cannot be expressed by screen printing

Suitable for standard

Caran d'Ache Ballpoint 849 Metal Fluo Series Green Brass Sport Push Pencil These are thin and flexibleThe Caran d'Ache ballpoint pen has a light metal body and classic clip. Includes one Goliath medium ink cartridge with stainless steel tip. About this item Metal Collection Fluorescent Green Ballpoint Pen Ink Color: Black Ballpoint Pen