IP68 Waterproof Fiber Optical Coupler, LC to LC Duplex Fiber Optic Cable Outdoor Waterproof Connector for LC Fiber Optic Cable Extension

I initially had the darnedest time with this widget. I had trouble getting the foam seal out, in, and especially out again when I wanted to move the splice to another cable. Then I read the directions here on Amazon, and life got vastly better. Be aware that the little fingers that hold the foam seal are usually tight enough that getting the foam out and then back in seems impossible, though it becomes very easy if you have some tool like a watchmaker's screwdriver at hand to use as a micro-pry-bar. (I used a knife, but that requires a lot of care lest you cut the foam.) Getting the foam back into the coupler's "fingers" takes some manipulation, but really isn't very hard once you get the hang of it. Anyway, the widget is great. Just do read the instructions here rather than doing silly things like I did. ;)