O-RING, NOT METAL DETECTABLE METAL DETECTABLE, NOT X-RAY DETECTABLE X-RAY DETECTABLE, SYSTEM OF MEASUREMENT INCH, CROSS SECTION SHAPE ROUND, O-RING MATERIAL EPDM, DUROMETER (HARDNESS) RATING MEDIUM HARD, NOMINAL INSIDE DIA. 3/8 IN, NOMINAL WIDTH 1/16 IN, ACTUAL INSIDE DIA. 0.364 IN, ACTUAL WIDTH 0.07 IN, DASH NUMBER 012, COLOR BLACK, DUROMETER 70A, MEETS/EXCEEDS 21CFR177.2600, ASTM D2000, NSF STANDARD 61, SAE J200, NOMINAL OUTSIDE DIA. 1/2 IN, AC