Modular Coupler, RJ11 (6x4), Straight, 50µ, Black, Deluxe Panel These straight wired modular couplers are available exclusively from Jaxx. Three configurations all fit into the same 0.669 x 0.906 inch rectangular opening. Wire contacts have 50 microinch gold plating for multiple insertions. Plastic is 94V0 rated, color Black. Flange accepts #4 or #5 mounting screws (purchased separately). Category 3 rated.