The Lew Electric L310-USB-BK is a black USB 2.0 keystone jack, each side is female. If being used with the BTK-6PB, only 3 will fit in one row only.

The Lew Electric L310-HDMI-BK is a black HDMI keystone jack, each side is female. 

The Lew Electric L310-420BK is a black blank keystone jack, this can be used to fill any unused keystone openings that are not being used. 

The Lew Electric L310-110BK is a black CAT5e RJ-45 keystone jack, each side is female. 

The Lew Electric L310-106BK is a black Cat3 phone RJ-11 keystone jack, each side is female. 

The Lew Electric BTK-6PB is a 6 port keystone decora plate. The plate accepts any sized keystone jacks and fits in a decora opening.