For those who have beautiful lamps and sockets are tired plastoc finally a product that has the mouth and the price seems quite correct relative to that of the same products plastoc. The connector-switch inside the socket itself is ceramic, as formerly! Sleeve big enough but quite compatible with the previous, black plastoc (original livery on a Roche-Bobois lamp and not having resisted the first fall of the lamp! RB should be supplied with that provider .. .)