These are containers for batteries for Canon cameras. They fit the LP-E6 and LP-E6N. The batteries ar used in cameramodels: EOS 7D Mark II, 7D, 5D Mark II, 5D Mark III, 5D Mark IV, 5DS, 5DS R, 60D, 60Da, 70D, 6D, and 6D Mark II Cameras I printed with 0.30 layerheight and transparent PLA. There is both single and dual containers in the design.