Sensei PRO 37-58mm Aluminum Step-Up Ring Hoya S-52INTENS this hot-swappable battery can be

this hot-swappable battery can be installed without shutting down the UPS

Typical Recharge Time: 12 hours

Holds 2 DSLRs & 7 Extra Lenses

Highly Durable

Carry-on size for select airlines

Sensei PRO 37-58mm Aluminum Step-Up Ring Hoya S-52INTENS this hot-swappable battery can beUse 58mm Filters on 37mm Lens Knurled Sides for Firmer Grip Matte Black Finish Minimizes Reflections Corrosion Resistant Hard Anodized Finish The Sensei PRO 37 58mm Aluminum Step Up Ring permits the use of 58mm threaded filters on lenses with 37mm filter threads. It has large side knurls to provide a more textured grip when mounting or removing it from a lens. This step up ring features a lightweight, aluminum alloy construction that has a corrosion