Lead is an important material because of its property to radiate the harmful radiation, thus acting as a shield in place of Nuclear works and X-ray regions.
Lead Bricks are basically the rectangular bricks with inter-locking capability. These are mainly used for the purpose of making shielding Walls in case of large area or

Apparent Density: 3.7 ± 0.1 g/cc
Fineness at 250 Mesh: 1% Maximum
Flow: 32
Metallic Purity: 99.7%
Particle Shape: Globular