RayTools Protective Lens 27.9mm Diameter 4.1mm Thickness 4kW Max Power
https://www.fabtechshop.com/shop/211lcg0037-raytools-protective-lens-27-9mm-diameter-4-1mm-thickness-4kw-max-power-2332
https://www.fabtechshop.com/web/image/product.template/2332/image_1920?unique=3b2a425
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Lens diameter: 27.9mm
Lens thickness: 4.1mm
Max Power: 4kW
Material: Fused silica
