Here is a Lot of Legrand Surface Box, Blank, RJ45, USB, HDMI, Cat 5 6 - Inserts & Couplers. Great for installers. 4 sealed Legrand 2 port surface boxes - F9048-WH-V1 Professional Grade. Cable Matters Cat 6 RJ45 inserts Keystone Jacks 180005 - 7 sealed, one open, with instructions.
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