N-BK7 or Equivalent

The wall thickness holds up exactly to spec, which saved me from having to rework my mounting flange. It’s heavy and solid, but the optical clarity through the BK7 material is genuinely impressive.

I needed a dome with that exact 25mm wall thickness for a prototype housing, and this one fit the spec perfectly. The optical clarity through the BK7 material is noticeably clean, with no distortion around the edges.

The 25mm thickness feels solid without adding much weight, and the BK7 material gave me the optical clarity I needed. Arrived well packed, no chips or scratches on the surface.