Ochiai Inverted Internal Ring

Code : IRTW-11, IRTW-12, IRTW-13, IRTW-14, IRTW-15, IRTW-16, IRTW-17, IRTW-18, IRTW-19, IRTW-20, IRTW-21, IRTW-22, IRTW-24, IRTW-25, IRTW-26, IRTW-28, IRTW- 30, IRTW-32, IRTW-34, IRTW-35, IRTW-36, IRTW-37, IRTW-38, IRTW-40, IRTW-42, IRTW-45, IRTW-47, IRTW-48

Ochiai Basic Internal Ring (RTW-6 throught 65), Basic External Ring (STW-58 through 300)Ochiai Basic Internal Ring (RTW-6 throught 65), Basic External Ring (STW-58 through 300)

Code : RTW-6, RTW-7, RTW-8, RTW-9, RTW-10, RTW-11, RTW-12, RTW-13, RTW-14, RTW-15, RTW-16, RTW-17, RTW-18, RTW-19, RTW-20, RTW-21, RTW-22, RTW-24, RTW-25, RTW-26, RTW-27, RTW-28, RTW-30, RTW-32, RTW-34, RTW-35, RTW-36, RTW-37, RTW-38, RTW-40, RTW-42, RTW-45