https://www.hitechseals.com/product/piston-cups/
Piston Cups - Hi-Tech Seals
piston cupshi techseals
https://shop.danmed.de/en/repair-parts/by-categories/cups-buttons/49860/cap-for-stopcock-piston-15
Cap for Stopcock Piston #15 | Cups / Buttons | _by categories | REPAIR PARTS | DANmed Webshop -...
Cap for Stopcock Piston #15usable for WOLF