Martin -Flex® Today´s Most Advanced Coupling. For High Strength, Better Balance, Easy Installation,  and the Strong Shaft Fit of the Taper Bushing. Martin HRC Coupling General purpose coupling for quick and easy assembly. OFFICE : ALVA PRIMA Toko Alat Teknik LTC Glodok Lt.2  2  Blok  C 27 No 6-7   dan BLOK C 41 No.1 JL.  Hayam Wuruk  No.127  Glodok – Jakarta Barat Phone  : 021 62320192 / 021 62320191 Email     :  alvaprima @ cbn.net.id