Features

Optical features
Bulk Absorption Coefficient when 10.6μm <= 0.0005 cm-1 
Temperature Change of Refractive Index when 10.6μm 61 x 10-6/°C 
Refractive Index Inhomogeneity when 0.6328μm < 3 x 10-6 

Thermal features
Thermal Conductivity when 20° C 0.18 W/cm/°C 
Specific Heat 0.356 J/g/°C 
Linear Expansion Coefficient when 20° C 7.57 x 10-6/°C 

Mechanical Features 
Young's Modulus 67.2 Gpa (9.75 x 106 psi) 
Rupture Modulus 55.1 Mpa (8,000 psi) 
Knoop Hardness 105-120 kg/mm2 
Density 5.27 g/cm3 
Poisson's Ratio 0.28

Specifications
for example
Diameter, mm Thickness, mm
10 * 2
12.7 * 2
12.7 * 3
19.05 * 3
19.05 * 4
20 * 2
20 * 3
20 * 4
25.4 * 3
25.4 * 4
25.4 * 5
38.1 * 4
38.1 * 6
38.1 * 9
50.8 * 6
50.8 * 8
50.8 * 10

Application:

CO2 laser machine