Kit Includes: Step Ring 37-49mm 49-52mm 52-55mm 55-58mm 58-62mm 62-67mm 67-72mm 72-77mm 77-82mm 49-37mm 52-49mm 55-52mm 58-55mm 62-58mm 67-62mm 72-67mm 77-72mm 82-77mm

Ultra-low chemical residues, attached to a solid,tight match

Special aviation aluminum alloy, high strength, impact resistance, twist and pressure

Lenses and filters come in different sizes and models, they don't always fit together correctly,but this step up and step down filter will solve this matter

18pcs Step Up and Step Down Ring Filter Set