They look very similar to the Holan ones?

A word of caution; the only thing with non-anodised or powder coated boxes is everything you put inside will get covered in black aluminum oxide marks. I found with my old TT Zegas the best solution was to buy some of that self-adhesive plastic bodywork protection film and stick it on the insides after a wipe down with wipe spirit (to remove any grease and oxide residue). Cheap and worked a treat, meaning you can indeed get away (like you have) with the cheaper uncoated ones.

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