1. Use good wood, polished smooth texture, good touch, not hurting hands 2. Coloring with environmentally friendly water-based paint, healthy and safe 3. Optical high-definition glass lens, good light transmission, high definition, small chromatic aberration, eye protection does not hurt vision 4. Material: wooden 5. Size: about 12x7.5 cm/piece, lens diameter is about 4 cm 6. Weight: about 45g/piece
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