These are LEGO Classic Space-style Minifigure Air Tanks in five rare colors. The orange and purple tanks are authentic LEGO pieces and the green and light gray tanks are custom unbranded pieces that are identical to their authentic counterparts. The dark gray tanks, however, appear to be using an alternative design that change some minor details but still look nearly identical at a glance. Part number 3838, these have appeared in many space-themed sets since the late 70s until today.

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