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###List of parts * 3 injection molded plastic (ABS) parts * 2 short screws * 2 long screws * black paper liner * diffraction grating * protective film * precision printed slit * jewelers screwdriver ###Instructions 1. Carefully pull out the grating without getting dust or fingerprints on it, and lay it ... 2. Place the double-sided tape on the interior of the molded plastic parts as shown 3. 4. ![IMG_20130827_164804.jpg](https://i.publiclab.org/system/images/photos/000/001/330/medium/IMG_20130827_164804.jpg) Sketchup model: smartphone-spec-overview.skp ##Mathew's Assembly Run## * 3 injection molded plastic (ABS) parts * 2 short screws * 2 long screws * 1 short black paper liner * 1 long black paper liner * 6 5mm lengths of double-sided tape * 1 5mm black foam tape * diffraction grating *protective film _I did without-- this extra step increases the chances of damaging the grating in order to protect it._ * precision printed slit * jewelers screwdriver * razor blade [See full image set here](https://www.flickr.com/photos/14397636@N07/sets/72157635289590145/with/9627692282/) backpack spectrometer assembly take 2 ![spec.gif](https://i.publiclab.org/system/images/photos/000/001/336/medium/spec.gif)