Nano Multi-Coated. Anti-Reflection Dimensions: 100mm x 100mm, 3.94" X 3.94". Ultra thin at approximately 2.0mm thickness. High Defintition Includes Light Seal Gasket & Metal Storage Tin / Case Made of high quality optical glass. NanoPro Multi-Coated. Dimensions: 100mm x 100mm, 3.94" X 3.94". Ultra thin at approximately 2.0mm thickness. ND16 / 1.2 / 4 F Stops. Compatible with 100mm Filter Holders. Includes Light Seal Gasket & Metal Storage Tin / Case.