EPDM Dobson Gaskets
Dobson Special EPDM (ethylenepropylene diene terpolymer) Gaskets 1.5mm thick gaskets.
Large is 56.5mm outer diameter with a 46.5mm inner diameter.
Small is 52mm outer diameter with a 38.5mm inner diameter,
Used on all cast iron radator bushes, end caps and joinging nipples,