12Pcs TG DN40/5 EPDM Check Valve Seat, Gasket, O-Ring 36mm/1.5"ID, 45.5mm/1.75"OD, 5mm/1/4"
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.