Add To Cart available Quick view Quick view Add Compare 6Pk ST ST Fiber Couplers F/F | Duplex Female ST... 2 reviews Price $22.95 6 Pack ST-ST Duplex Fiber Optic Couplers, female to female pass-through connection for 62.5/125 multimode, 50/125 multimode or 9/125 singlemode fiber optic patch cables.