Ball of Prumo yarn, 4mm - 250g

4mm plumb bob essential in construction, mainly used by bricklayers, tilers and construction workers to ensure perfect vertical alignment of walls, columns and structures.

Diameter (4mm): considered thick and robust for plumb bobs, it offers high mechanical resistance against abrasion when in contact with bricks, blocks and concrete.

Made of twisted/braided cotton, preferred for better gripping of chalk powder (if used for marking) and for tying firm knots without slipping.

Weight of the bob: 250gr.