The Hultafors Chalk Line comes with a cast powder-coated aluminium body with a sliding filler cover.
The cord is braided cotton/polyester, the cotton absorbs the chalk while the polyester provides the strength, and the braid ensures the cord never tangles.
The cord is 1mm in diameter, and has a rupture limit of 16 Kg.

Specifications:

Line Length: 30m (100ft).
Capacity: 80g of chalk.