6 Pack Duplex LC to LC F/F Coupler Keystone Jack Modular for Patch Panels and Wall Plates,Surface Mount Boxes, LC UPC Fiber Optic Adapter Compatible with SingleMode Multimode|1.25G/10GB OS1-2/OM1-3)

These will do fine for multi mode interconnections. As with using all fiber check your length. And SFP’s

Not much to say it’s a product that does what it’s supposed to

Good quality RJ45 Jacks, fit perfectly

These work well, but have a few issues. First issue is there is not to much quality control. All I have purchased work well, but the fit for the lc connectors are inconsistent, sometimes being verry tight, some loose. Also in a standard keystone patch panel, these do not fit side by side without cutting the blue sides down to not interfere with fit. These connect well, and I have yet to get a faulty one, but there could be more effort put into overall quality and fit.

The little blue tabs on the side make each of these occupy 3 slots in a 24-port patch panel. Maybe there are other patch panels where these as usable but they’re recycling in my rack.

Works well but doesn’t work in a patch panel because of how wide it is. Unless you go every other keystone

They work, but if you want to use two keystones right next to each other, you are going to have a problem. The connector has little plastic ears that block the space for the neighboring keystone. To fix that you have to take a saw and remove them.The question arises why such connectors are sold if you cannot use two right next to each other.For that -2 stars.See pictures: Before / saw in action / after removing the ears.

if you are installing in a rack do not buy these not enough room