Sensei PRO 46-37mm Aluminum Step-Down Ring Training & Behavior Aids the optical tubes are nitrogen-filled

the optical tubes are nitrogen-filled and O-ring sealed to be water and fogproof

lay-flat design provides easy-access to contents

& GND Pins Broken Out

with a high-tensile titanium center hinge axle

UPC: 702730990650

Sensei PRO 46-37mm Aluminum Step-Down Ring Training & Behavior Aids the optical tubes are nitrogen-filledUse 37mm Filters on 46mm Lens Knurled Sides for Firmer Grip Matte Black Finish Minimizes Reflections Corrosion Resistant Hard Anodized Finish The Sensei PRO 46 37mm Aluminum Step Down Ring permits the use of 37mm threaded filters on lenses with 46mm filter threads. It has large side knurls to provide a more textured grip when mounting or removing it from a lens. This step down ring features a lightweight, aluminum alloy construction that has a