OPTICAL LASER FILTER 1" mounted bandpass 490nm Edmund Optics Newport omega? Description: no longer needed in my lab. I have not full information (only bandpass), but you may know enough of it given this information. Tests done with "mirror side" facing light source. Measures: Mount is exactly 1" 25,4mm (filter a bit smaller to fit in mount). Thickness is 0,246" (6,24mm). Catalog number and other info: D.O. #15-20260 NZS 5-6 (this last number might be the cut-on cut-off tolerances in nm) Straight light-through behaviour (0º angle): LED HALOGEN light source show light CYAN. Edge-on light-through behaviour through HALOGEN light source (around 80º angle): PURPLE color. Weight: 5,8gr. Condition: filter shows nice. No scratches or haze. I would say EXCELLENT OVERALL condition. Delivered in original package. Shipping: Remember I combine shipping. Ask for invoice (through) BEFORE paying if I didn't send it to you yet!)