Park a loupe between inspection sessions. Open central recess keeps the middle of the optic away from the base; three finger gates. MEASURE FIRST: Loupe with base outside diameter 54–60 mm, flat annular rim outside Ø50 mm. Check rim contact before placing optical glass. USE: Rest the loupe on its housing rim only. No lens glass should touch the print. Not a protective carrying case. Includes 1 printed part in matte black PLA. Dimensions: 84.0 × 84.0 × 9.0 mm. Accessories are not included. Dry indoor bench use only. No physical tests of fit, stability or durability. Images are CAD renders. Design: João Lutz / JoaoLutzFilm, developed with AI assistance. Original CAD.