Co điếu ren trong ren ngoài thuỷ lực

RT 13 – RN 13, RT 13 – RN 17, RT 13 – RN 9.6, RT 17 – RN 13, RT 17 – RN 17, RT 21 – RN 21, RT 9.6 – RN 13, RT 9.6 – RN 9.6