EPDM GASKETS FOR SULFUR DIOXIDE EPDM: ETHYLENE PROPYLENE DIENE MONOMER Shelf-Life: 5 years, manufacturer’s recommendation. BEGS - SB REPLACEMENT GASKET SET CONTAINS: (STYLE CURRENT AS OF MAY, 1 2014) (2)  4-12BEP GASKET MOLDED EPDM (4" OD x 2-5/8" ID x 1/4" wall) 2 64.50(1)  12-BBEP GASKET MOLDED EPDM (5" OD x 2" ID x 1/2" wall) 1 56.75(1)  12-MEP GASKET  MOLDED EPDM (5-1/4" OD x 2-1/4" ID x 3/4" wall) 1 60.25(2)  8-9EP GASKET EPDM MATERIAL 2-1/2" sq. x 1/8" thick 2 25.25 Note: Gaskets can be used for Ammonia as well. 5 YEAR RECOMMENDED SHELF-LIFE