Replacement gasket for Mega Max large bore, full bore coupling with oversize claws. Pack of 10. Use full bore abrasive blast hose couplings for high air volume applications. They are essential on 1-1/2 inch 2 ply blast hose or above. The abrasive blasting media /compressed air mix is less restricted through larger diameter blast hoses with full flow/full port blast couplings. Check gaskets daily.