Magnetic Step-Up Rings let you instantly mount larger magnetic filters on smaller lenses — expanding creative flexibility while reducing the gear you carry. CNC-machined from 6061 aluminium with an anti-reflective finish for long-term durability and optical clarity. - Adapts larger filters to smaller lenses- Precision-fit, lens-facing threads - Fast, secure magnetic filter-facing mount- Durable, corrosion-resistant aluminium- Knurled edge for enhanced grip- Lifetime warrantyPlease note: This Magnetic Step Up Ring Filter Adapter is designed for use with Magnetic Plus Filters. Not compatible with Magnetic Pro Filters.