You must choose the lead size that fits your mechanical pencil. For example a 0.7mm pencil will ONLY take 0.7mm leads. If you are unsure of you size please contact our staff. Brands are interchangeable as long as the correct millimetre sizing applies.
The letters indicate the composition of the lead and will give a darker or lighter look and a softer or harder feel.
3.15 fits Lamy 3.15 Scribble clutch pencil.
1.4 suits Lamy ABC student pencils