8Pcs TG #11 DN15/4.5 EPDM Check Valve Seat, Gasket, O-Ring 18mmID 26mm ID 4.5mm
The original intention for these was a gasket for a check valve.
Seeing how they are EPDM, they can be used for a variety of purposes.
High quality product from Germany.
Fast US Shipping
30-day warranty.