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This is a paid asset, but now you can download Sci-Fi icons pack Free.
Sci-Fi icons pack v1.01
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Set of 121 hand drawn Sci-Fi icons. This set includes: armor, boxes, guns, technical parts, ammunition and also another little interesting things. Icons are of a high quality. All Icons have transparent background so you can place it on any surface you need.
– Each icon is 256×256 pixels size (PNG);
– 121 unique icons and its varieties;
– All Icons have transparent and black background.