You will get the following: 5 tubes of 0.7 mm black lead refill for 0.7mm mechanical pencils. Each tube will have 24 individual leads. Lead length is standard 60 mm. Refill any 0.7 mm mechanical pencil with this lead. The thickness of this lead is 0.7 mm and will fit all 0.7 mm mechanical pencils regardless of the mechanical pencil brand. The lead refill length is 60 mm These lead refills come with 12 leads per tube for convenience and it make it easier to carry the mechanical pencil leads with you so you can refill the mechanical pencil.