Air Pump Cap

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!