Circuit Playground Bluefruit Battery LiPo 3.7V/500mA MakeCode Maker 3D Printer Filament PETG Transparent/Clear - Main Body Filament PETG Transluscent Green - Cord Fixtures Bolts M2.5/30mm + nuts - Qty 4 Paracord 140cm length, 1.18mm diameter For maximum strength the Infill was set to 100% for all elements. Base adhesion: Brim No supports are required. The total number of elements consisting of a battery compartment, microcontroller compartment, two buttons and two cord supports. Subject to the size of your printer bed and any colour options, elements can be grouped togther to reduce print runs. Total print time: 12 hrs 30 mins (In my experience Cura over estimates the print time, therefore consider this worst case)