This is the Marumi MC-UV 40.5mm Filter [MAUVF405] The Marumi MC-UV range of filters will block ultraviolet rays, and are most effective for distance photography. An ideal filter for shooting in coastal and mountains areas. Also available: Marumi MC-UV 37mm Filter (MAUVF37) Marumi MC-UV 40.5mm Filter (MAUVF405) Marumi MC-UV 40mm Filter (MAUVF40) Marumi MC-UV 43mm Filter (MAUVF43) Marumi MC-UV 46mm Filter (MAUVF46) Marumi MC-UV 49mm Filter (MAUVF49) Marumi MC-UV 52mm Filter (MAUVF52) Marumi MC-UV 55mm Filter (MAUVF55) Marumi MC-UV 58mm Filter (MAUVF58) Marumi MC-UV 62mm Filter (MAUVF62) Marumi MC-UV 67mm Filter (MAUVF67) Marumi MC-UV 72mm Filter (MAUVF72) Marumi MC-UV 77mm Filter (MAUVF77) Marumi MC-UV 82mm Filter (MAUVF82) Marumi MC-UV 86mm Filter (MAUVF86) Marumi MC-UV 95mm Filter (MAUVF95) ...Contact us if you need more help.