RayTools Biconvex Collimating Lens 30mm Diameter 100mm Focal Length 3.3kW Max Power
https://www.fabtechshop.com/shop/110255aacbhe0090-raytools-biconvex-collimating-lens-30mm-diameter-100mm-focal-length-3-3kw-max-power-2798
https://www.fabtechshop.com/web/image/product.template/2798/image_1920?unique=71072d6
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Lens diameter: 30mm
Focal length: 100mm
Max Power: 3.3kW
Material: Fused silica