High strength aluminium material shield 

Material: High strength aluminum alloy
Visible Light Transmission(observation window): 70%
Size: 900mm * 500mm (observation window is 240mm*130mm)
Thickness: 2mm
Weight: 3.75Kg
Anti strike performance:-30℃- 55℃, 18m / s speed, 350 joules of energy to hit the shield body is not broken, the observation window do not fall off
Anti impact performance:147 joules of kinetic energy's impact, the shield body is not broken, the observation window do not fall off
Puncture resistance:147 joules of kinetic energy's piercing, piercing point of the shield body aperture <6mm, shield body is not broken, the observation window do not fall off
Adjustable velcro arm strap easy to release or fasten