Schott RG9

Cutting IR while passing the visible band exactly as the transmission curve promised, this filter did what I needed for my laser setup. Arrived well packed with clean edges and no scratches on the surfaces.

The 3mm thickness gives it a solid, durable feel that handles regular handling in my lab without worry. It cuts off wavelengths cleanly right where I need it, though I wish the dimensions were listed more clearly on the product page before ordering.

The 3mm thickness gives it a solid feel, and it does a clean job blocking UV without distorting the visible spectrum. Slight edge glare under strong light, but nothing that affects my setup.