282U REFERENCE MOUTH BARREL LENGTH RUBBER STANDARD 282 19.3 mm 18.5 mm 286 mm FDA, JETRO

TLC-U1 REFERENCE MOUTH BARREL LENGTH RUBBER STANDARD 282 19.4 mm ---- 288 mm FDA, JETRO

6RU REFERENCE MOUTH BARREL LENGTH RUBBER STANDARD 6R 18.8 mm 19.4 mm 298 mm FDA, JETRO