Just need 16 sets of LC to LC duplex single-mode couplers. And then found these couplers on the website. One specific requirement about the color—its blue outlook just fit. I tried these adapters on my own panel: excellent durability & stability! The price is also competitive with other suppliers. Worth to buy!

Quite satisfied with FS's overall service system. Got instant responses and professional support from the account manager and the tech guys; Received my packages on time; Operated well with our equipment. Really nice one-stop service.