nfc tag core 3d model

# Ground tag — device + accessory spec ## The core: one tag, everything else is a holder Design the tag as a bare "core" that slots into holders. The core is the product; holders are the accessories. That gives you three SKUs from one NFC part and one print file, and it's the reason someone buys a second one. ### Core tag - Rounded square 36 × 36 × 6 mm, corner radius 7. Smaller than Brick (40 × 8) on purpose — it needs to live inside holders. - Inside: NTAG215 coin (25 mm) sitting 1.2 mm under the top face. No magnet in the core — magnets go in the holders (see interference below). - Top face: the dot-on-line mark, debossed 0.5 mm. That's the only mark. No text anywhere. - Edge: a 1 mm groove running around the perimeter at mid-height. This is what every holder clips into. It also reads as a design detail — a thin line around the object, same as the line in the logo. - Bottom: flat, with a 2 mm blind dimple in the centre so you can pop it out of a holder with a fingernail. ### Tex