As of January 4, 2014 it has been illegal to introduce products into commerce for drinking water applications UNLESS they are tested and meet the new version of the lead-free standard Standard rubber compounds used in gaskets and seals in potable water applications must be proven to prevent leaching of harmful contaminants prior to installation Certification to NSF-61 provides assurance to a highest level that American Biltrite rubber EPDM NSF gasket strips supplied by Sterling Seal & Supply is safe for use in drinking water service SPECIFICATION ASTM D2000; Hardness Shore A 75 +/- 5, ASTM D1330 Grade 1 & 2, POLYMER: Ethylene-Propylene (EPDM); ASTM D412 TENSILE (PSI): 1500 min.; ULTIMATE ELONGATION(%) 250 min. ASTM Grade Maximum pieces per roll: 2; Minimum piece length: 10’; Width tolerance: -0/+1”; Length tolerance: +/- 10%; Excellent resistance to heat, ozone and sunlight. Superior resistance to cold and hot water