E14 and E27 sockets. Black, thermohardening resin sockets for E14 and E27 bulbs, 60 W maximum, supplied as 3 pre-screwed parts. Copper alloy ferrule; cap with threaded M10 metal connector with stopper and anti-rotation locking screw. Half-threaded sleeve with ferrule in insulating material. The corresponding rings must be ordered separately, E27 ring RS Stock no ; 220-3093 220-3093 , E14 ring RS Stock no ; 220-3071 220-3071 .