Isograph 0.50

Isograph Rotring technical writing instruments are precisely designed and manufactured for optimum performance. The hard, chrome-plated, fine nib is wear-resistant and allows for highly detailed design. They include a pouch for easy access to the ink helix and for quick cleaning when needed. The ink level is visible. They can be refilled quickly and easily. They have a color-coded indicator for easy recognition of the writing width.