Air Pump Cap
thingiverse
This is a cap for standard air pumps for balls to protect the needle (and you from it). The specific pump that is pictured is here: https://www.amazon.com/gp/product/B0BSNZS956/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1, but any pump with an 18.7mm tip diameter should be compatible. Tips are always welcome!
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