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 NEOPRENE, DUROMETER (HARDNESS) RATING MEDIUM HARD, NOMINAL INSIDE DIA. 3 IN, NOMINAL WIDTH 3/16 IN, ACTUAL INSIDE DIA. 2.975 IN, ACTUAL WIDTH 0.21 IN, DASH NUMBER 337, COLOR BLACK, DUROMETER 70A, MEETS/EXCEEDS ASTM D2000, SAE J200, NOMINAL OUTSIDE DIA. 3 3/8 IN, ACTUAL OUTSIDE DIA. 3.395 IN,