FDA BUNA-N SANITARY GASKET FOR 1.5″ TUBE TRI-CLAMP GASKETS ARE SEALS MADE OF FDA MATERIALS ARE DESIGNED TO FIT THE GROOVES OF TRI-CLAMP TUBE FITTINGS USED PRIMARILY IN FOOD PROCESSING LINES, AS WELL AS IN THE PHARMACEUTICAL AND BIOTECH INDUSTRIES. THE UNIQUELY DESIGNED SHAPE PROVIDES A TIGHT SEAL FOR EXTREMELY HIGH PURITY, WHICH MEETS ALL THE NECESSARY STANDARDS FOR MANUFACTURERS. BUNA-N HAS EXCELLENT RESISTANCE TO WATER, FUELS, AND OILS.