4吋透射球面盒、金屬標準件、4吋UTS盒與泡棉

The foam cutouts hold my 4" transmission sphere perfectly snug, no rattling at all. The metal case feels sturdy enough to toss in a travel crate without worry. Exactly the protection I needed.

Finally found a hard case that actually fits these transmission spheres without any jiggling around. The metal exterior gives me confidence tossing it in my toolbox, and the foam keeps everything securely in place.

The foam insert cradles the optic so snugly that I stopped worrying about it shifting during transport. Latches close with a solid click and the case hasn't picked up a single dent after a few months of lab use.